Enable the workaround for the Loongson 2F bug by default.

Patch by Mark H Weaver <mhw@netris.org>.

--- binutils/gas/config/tc-mips.c.orig	2012-09-04 10:21:03.000000000 -0400
+++ binutils/gas/config/tc-mips.c	2013-10-06 02:23:21.651983768 -0400
@@ -910,10 +910,10 @@
 };
 
 /* ...likewise -mfix-loongson2f-jump.  */
-static bfd_boolean mips_fix_loongson2f_jump;
+static bfd_boolean mips_fix_loongson2f_jump = FALSE;
 
 /* ...likewise -mfix-loongson2f-nop.  */
-static bfd_boolean mips_fix_loongson2f_nop;
+static bfd_boolean mips_fix_loongson2f_nop = TRUE;
 
 /* True if -mfix-loongson2f-nop or -mfix-loongson2f-jump passed.  */
 static bfd_boolean mips_fix_loongson2f;
--- binutils/gas/testsuite/gas/mips/mips.exp.orig	2012-09-04 10:17:13.000000000 -0400
+++ binutils/gas/testsuite/gas/mips/mips.exp	2013-10-06 02:23:21.663983768 -0400
@@ -91,6 +91,12 @@
 
     # Catch because the variable won't be set the first time through.
     catch {unset mips_arches}
+
+    # Disable the loongson2f nop fix by default, because most of the
+    # existing test cases for mips will fail otherwise.
+    global ASFLAGS
+    set old_ASFLAGS "$ASFLAGS"
+    set ASFLAGS "$ASFLAGS -mno-fix-loongson2f-nop"
 }
 
 # mips_arch_create ARCH GPRSIZE EXTENDS PROPS AS_FLAGS OBJDUMP_FLAGS \
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<tr><td><span title='2023-06-17 14:38:32 +0200'>2023-06-17</span></td><td><a href='/guix/commit/gnu/system/hurd.scm?id=ff690faf66d8f37ee6b679fcb7cf37e369624ee3'>gnu: Use target-hurd?, system-hurd? instead of hurd-target?, hurd-system?.</a><span class='msg-avail'>...</span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2023-03-30 12:44:20 +0200'>2023-03-30</span></td><td><a href='/guix/commit/gnu/system/hurd.scm?id=fda221c469f8d31cdc22bc5053e6b19017764c62'>system: hurd: Use shepherd-0.8 in the package list.</a><span class='msg-avail'>...</span></td><td>Josselin Poiret</td></tr>
<tr><td><span title='2023-03-03 17:55:32 +0100'>2023-03-03</span></td><td><a href='/guix/commit/gnu/system/hurd.scm?id=6edacf249110ce9e59dc44f330d7f03ecd7c60d8'>services: base: Deprecate 'syslog-service' procedure.</a><span class='msg-avail'>...</span></td><td>Bruno Victal</td></tr>
<tr><td><span title='2022-11-28 11:19:31 +0100'>2022-11-28</span></td><td><a href='/guix/commit/gnu/system/hurd.scm?id=e3c6575ee93741a43003cd1aa4663151dd90b9f5'>system: hurd: Create more ttys.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
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<tr><td><span title='2022-03-09 23:38:18 +0100'>2022-03-09</span></td><td><a href='/guix/commit/gnu/system/hurd.scm?id=a208a4e923797dcaf6d63dbf2403714d62de8e5a'>system: hurd: Move the Shepherd before the Hurd in %BASE-PACKAGES/HURD.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-12-12 23:20:50 +0100'>2021-12-12</span></td><td><a href='/guix/commit/gnu/system/hurd.scm?id=5967aee398c26a4814da1d8dba3f2dba84b06a4b'>services: Define '%loopback-static-networking'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-12-12 23:20:49 +0100'>2021-12-12</span></td><td><a href='/guix/commit/gnu/system/hurd.scm?id=1644f4f1f8957f3f3a88037aed80d501fdceaae7'>services: Define '%qemu-static-networking'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-12-12 23:20:49 +0100'>2021-12-12</span></td><td><a href='/guix/commit/gnu/system/hurd.scm?id=223f1b1eb3707f1d3ef91200dd616ee6c8b77db0'>services: static-networking: Change interface to mimic netlink.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-10-18 10:00:50 +0200'>2021-10-18</span></td><td><a href='/guix/commit/gnu/system/hurd.scm?id=d1053f8969f0d27308e9ae7b017804d147c42da4'>system: hurd: Add 'info-reader' to %BASE-PACKAGES/HURD.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-08-29 01:05:26 -0400'>2021-08-29</span></td><td><a href='/guix/commit/gnu/system/hurd.scm?id=da4e40948326387d5bcda58783914d5f9ce8b095'>Migrate to the new 'targets' field of bootloader-configuration.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-08-12 12:34:13 +0200'>2021-08-12</span></td><td><a href='/guix/commit/gnu/system/hurd.scm?id=8b9a5641bc1b6acb62e0e0467ee03cefde2d1757'>system: install, hurd: Use 'setuid-programs'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-02-22 20:44:58 +0000'>2021-02-22</span></td><td><a href='/guix/commit/gnu/system/hurd.scm?id=7c5e5e0e0fbf11ebaaeb8f98ed6c75289ca31795'>system: hurd: Have the static networking provision 'networking.</a><span class='msg-avail'>...</span></td><td>Christopher Baines</td></tr>