Dfu-programmer cannot cannot find libusb. This patch fixes that.

diff --git a/src/dfu-device.h b/src/dfu-device.h
index bbdfa99..31af0e8 100644
--- a/src/dfu-device.h
+++ b/src/dfu-device.h
@@ -6,7 +6,7 @@
 #endif
 #include <stdint.h>
 #ifdef HAVE_LIBUSB_1_0
-#include <libusb.h>
+#include <libusb-1.0/libusb.h>
 #else
 #include <usb.h>
 #endif

diff --git a/src/main.c b/src/main.c
index ef2aa16..dcc3636 100644
--- a/src/main.c
+++ b/src/main.c
@@ -24,7 +24,7 @@
 #include <stdio.h>
 #include <string.h>
 #ifdef HAVE_LIBUSB_1_0
-#include <libusb.h>
+#include <libusb-1.0/libusb.h>
 #else
 #include <usb.h>
 #endif

diff --git a/src/dfu.c b/src/dfu.c
index 7dbcc57..952e896 100644
--- a/src/dfu.c
+++ b/src/dfu.c
@@ -27,7 +27,7 @@
 #include <stdlib.h>
 #include <stddef.h>
 #ifdef HAVE_LIBUSB_1_0
-#include <libusb.h>
+#include <libusb-1.0/libusb.h>
 #else
 #include <usb.h>
 #endif

diff --git a/src/dfu.h b/src/dfu.h
index 2a159e8..63510f2 100644
--- a/src/dfu.h
+++ b/src/dfu.h
@@ -25,7 +25,7 @@
 # include <config.h>
 #endif
 #ifdef HAVE_LIBUSB_1_0
-#include <libusb.h>
+#include <libusb-1.0/libusb.h>
 #else
 #include <usb.h>
 #endif
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<div class='path'>path: <a href='/guix/log/?id=eacffb9e68c3b404e256644b74efd7af7ac03bf2'>root</a>/<a href='/guix/log/gnu?id=eacffb9e68c3b404e256644b74efd7af7ac03bf2'>gnu</a>/<a href='/guix/log/gnu/packages?id=eacffb9e68c3b404e256644b74efd7af7ac03bf2'>packages</a>/<a href='/guix/log/gnu/packages/parallel.scm?id=eacffb9e68c3b404e256644b74efd7af7ac03bf2'>parallel.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/parallel.scm?id=eacffb9e68c3b404e256644b74efd7af7ac03bf2&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-12-30 17:53:07 -0500'>2020-12-30</span></td><td><a href='/guix/commit/gnu/packages/parallel.scm?id=50abaf63879c93e0ea0e09883defe639396fb04c'>gnu: slurm: Update to 20.11.2.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/parallel.scm (slurm): Update to 20.11.2.

Signed-off-by: Leo Famulari &lt;leo@famulari.name&gt;
</span></span></td><td>Vincent Legoll</td></tr>
<tr><td><span title='2020-12-01 21:12:17 +0200'>2020-12-01</span></td><td><a href='/guix/commit/gnu/packages/parallel.scm?id=410d5550b0f7e42686fd13fe2f11bde4afcfac0c'>gnu: Add slurm-18.08.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/parallel.scm (slurm-18.08): New variable.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2020-11-23 19:22:30 +0100'>2020-11-23</span></td><td><a href='/guix/commit/gnu/packages/parallel.scm?id=2d3c9320731367427072a5b448fba857352db7cb'>gnu: parallel: Update to 20201122.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/parallel.scm (parallel): Update to 20201122.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-11-20 02:26:47 +0100'>2020-11-20</span></td><td><a href='/guix/commit/gnu/packages/parallel.scm?id=5ccd270ab225b253c93e85cb16e3cc0eacd0753a'>gnu: parallel: Update to 20201022.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/parallel.scm (parallel): Update to 20201022.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-11-02 14:59:34 +0100'>2020-11-02</span></td><td><a href='/guix/commit/gnu/packages/parallel.scm?id=e1bd62eb5ce0f2410b2607f157989588791b43e0'>gnu: slurm: Reintroduce version 19.05.</a><span class='msg-avail'>...<span class='msg-tooltip'>Partly fixes &lt;https://bugs.gnu.org/44387&gt;.

* gnu/packages/parallel.scm (slurm-19.05): New variable.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-10-15 10:39:33 +0300'>2020-10-15</span></td><td><a href='/guix/commit/gnu/packages/parallel.scm?id=d623ece56624fd7d611cdaf42f728b21d89fec5c'>gnu: slurm: Re-arrange package inputs.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/parallel.scm (slurm)[inputs]: Move expect, perl,
python-wrapper from here...
[native-inputs]: ... to here.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2020-10-14 15:22:29 +0200'>2020-10-14</span></td><td><a href='/guix/commit/gnu/packages/parallel.scm?id=3c338135f1ec218f2cd19786a13b883ed36f12bb'>gnu: slurm: Update to 20.02.5.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/parallel.scm (slurm): Update to 20.02.5.
</span></span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2020-08-23 18:19:57 +0200'>2020-08-23</span></td><td><a href='/guix/commit/gnu/packages/parallel.scm?id=7e33054be8bc39c279a68466ae7a1ee6978ccc67'>gnu: parallel: Update to 20200822.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/parallel.scm (parallel): Update to 20200822.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-07-23 23:51:22 +0200'>2020-07-23</span></td><td><a href='/guix/commit/gnu/packages/parallel.scm?id=4ba0f3b597f7099c5a780cad45b86c2e384507ea'>gnu: parallel: Update to 20200722.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/parallel.scm (parallel): Update to 20200722.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-06-30 09:31:53 +0300'>2020-06-30</span></td><td><a href='/guix/commit/gnu/packages/parallel.scm?id=5511395b0511dc6eb724c9a1542e2913a3339982'>gnu: parallel: Update to 20200622.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/parallel.scm (parallel): Update to 20200622.
</span></span></td><td>Efraim Flashner</td></tr>