Don't refer to x86-specific function on other architectures to avoid linker error.

Submitted upstream at <https://marc.info/?l=linux-bluetooth&m=160857625608440&w=2>

diff --git a/sbc/sbc_primitives.c b/sbc/sbc_primitives.c
--- a/sbc/sbc_primitives.c
+++ b/sbc/sbc_primitives.c
@@ -593,7 +593,9 @@ static int sbc_calc_scalefactors_j(
 
 static void sbc_init_primitives_x86(struct sbc_encoder_state *state)
 {
+#if defined(__x86_64__) || defined(__i386__)
 	__builtin_cpu_init();
+#endif
 
 #ifdef SBC_BUILD_WITH_MMX_SUPPORT
 	if (__builtin_cpu_supports("mmx"))
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<div class='path'>path: <a href='/guix/log/?id=3d5d0eb44f7e4cc96d0fab585e9cc581d518f402'>root</a>/<a href='/guix/log/tests?id=3d5d0eb44f7e4cc96d0fab585e9cc581d518f402'>tests</a>/<a href='/guix/log/tests/grafts.scm?id=3d5d0eb44f7e4cc96d0fab585e9cc581d518f402'>grafts.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/tests/grafts.scm?id=3d5d0eb44f7e4cc96d0fab585e9cc581d518f402&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-11-11 23:17:42 +0100'>2022-11-11</span></td><td><a href='/guix/commit/tests/grafts.scm?id=19206eee69e8c22d63104af1b7f1f815969bff7f'>grafts: Run with a UTF-8 locale.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://issues.guix.gnu.org/55968&gt;.
Reported by Maxime Devos &lt;maximedevos@telenet.be&gt;.

* guix/grafts.scm (%graft-with-utf8-locale?): New parameter.
(graft-derivation/shallow)[glibc-locales, set-utf8-locale]: New
variables.
[build]: Use 'set-utf8-locale'.
* tests/gexp.scm, tests/grafts.scm, tests/packages.scm: Set
'%graft-with-utf8-locale?' to #f.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-04-15 03:22:55 -0400'>2021-04-15</span></td><td><a href='/guix/commit/tests/grafts.scm?id=1bab9b9f17256a9e4f45f5b0cceb8b52e0a1b1ed'>grafts: Support rewriting UTF-16 and UTF-32 store references.</a><span class='msg-avail'>...<span class='msg-tooltip'>Partially fixes &lt;https://bugs.gnu.org/33848&gt;.

* guix/build/graft.scm (replace-store-references): Add support for
finding and rewriting UTF-16 and UTF-32 store references.
* tests/grafts.scm: Add tests.
</span></span></td><td>Mark H Weaver</td></tr>