Fix MIPS assembly code to work with newer GCC, where the "=h"
constraint is no longer supported.

--- libmad/fixed.h.orig	2004-02-16 21:02:03.000000000 -0500
+++ libmad/fixed.h	2011-10-29 18:47:21.000000000 -0400
@@ -304,8 +304,8 @@
  * significant bit depends on OPT_ACCURACY via mad_f_scale64().
  */
 #  define MAD_F_MLX(hi, lo, x, y)  \
-    asm ("mult	%2,%3"  \
-	 : "=l" (lo), "=h" (hi)  \
+    asm ("mult	%2,%3\n\tmfhi  %1"  \
+	 : "=l" (lo), "=r" (hi)  \
 	 : "%r" (x), "r" (y))
 
 # if defined(HAVE_MADD_ASM)
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<div class='path'>path: <a href='/guix/log/?id=cb4b508cd68df89bfbd5255a0c5569f8318ad50f&amp;showmsg=1'>root</a>/<a href='/guix/log/gnu?id=cb4b508cd68df89bfbd5255a0c5569f8318ad50f&amp;showmsg=1'>gnu</a>/<a href='/guix/log/gnu/packages?id=cb4b508cd68df89bfbd5255a0c5569f8318ad50f&amp;showmsg=1'>packages</a>/<a href='/guix/log/gnu/packages/patches?id=cb4b508cd68df89bfbd5255a0c5569f8318ad50f&amp;showmsg=1'>patches</a>/<a href='/guix/log/gnu/packages/patches/mumble-1.2.19-abs.patch?id=cb4b508cd68df89bfbd5255a0c5569f8318ad50f&amp;showmsg=1'>mumble-1.2.19-abs.patch</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/patches/mumble-1.2.19-abs.patch?id=cb4b508cd68df89bfbd5255a0c5569f8318ad50f'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2018-06-10 16:03:35 +0200'>2018-06-10</span></td><td class='logsubject'><a href='/guix/commit/gnu/packages/patches/mumble-1.2.19-abs.patch?id=fc51c11b9d2534050ee32ea4598dc1ccef911913'>gnu: mumble: Fix build with Boost 1.66.</a></td><td>Danny Milosavljevic</td></tr>
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Fixes &lt;https://bugs.gnu.org/31775&gt;.

* gnu/packages/patches/mumble-1.2.19-abs.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/telephony.scm (mumble)[source]: Add it.


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