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
a7a15b'>refs</a><a class='active' href='/guix/log/gnu/packages/abiword.scm'>log</a><a href='/guix/tree/gnu/packages/abiword.scm?id=8b221b64a552d31e241701aa5c6d339287a7a15b'>tree</a><a href='/guix/commit/gnu/packages/abiword.scm?id=8b221b64a552d31e241701aa5c6d339287a7a15b'>commit</a><a href='/guix/diff/gnu/packages/abiword.scm?id=8b221b64a552d31e241701aa5c6d339287a7a15b'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/packages/abiword.scm'>
<input type='hidden' name='id' value='8b221b64a552d31e241701aa5c6d339287a7a15b'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=8b221b64a552d31e241701aa5c6d339287a7a15b'>root</a>/<a href='/guix/log/gnu?id=8b221b64a552d31e241701aa5c6d339287a7a15b'>gnu</a>/<a href='/guix/log/gnu/packages?id=8b221b64a552d31e241701aa5c6d339287a7a15b'>packages</a>/<a href='/guix/log/gnu/packages/abiword.scm?id=8b221b64a552d31e241701aa5c6d339287a7a15b'>abiword.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/abiword.scm?id=8b221b64a552d31e241701aa5c6d339287a7a15b&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-01-22 22:12:34 +0100'>2020-01-22</span></td><td><a href='/guix/commit/gnu/packages/abiword.scm?id=4bd428a7ce382f623784a3ff8186aadc3cebca91'>gnu: Replace uses of 'libjpeg' with 'libjpeg-turbo'.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-01-09 02:40:25 +0300'>2020-01-09</span></td><td><a href='/guix/commit/gnu/packages/abiword.scm?id=64c1e6fe4ab440e2bb3b5fe6ed7a659f1cdd5b98'>gnu: abiword: Update to 3.0.4.</a><span class='msg-avail'>...</span></td><td>Oleg Pykhalov</td></tr>
<tr><td><span title='2019-10-20 14:00:12 +0200'>2019-10-20</span></td><td><a href='/guix/commit/gnu/packages/abiword.scm?id=0fe041bd9fa87d23b44969a3bcd99b1165a0f06e'>gnu: Remove more GCC &lt; 7 workarounds.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>