fix sse optimizations build on 32-bit with gcc 4.9
http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=351af417bae0d09bd5a3753d1237f03adf591933

xmm_quantize_sub.c: In function 'init_xrpow_core_sse':
xmm_quantize_sub.c:65:18: warning: SSE vector return without SSE enabled changes the ABI [-W
psabi]
     const __m128 vec_fabs_mask = _mm_loadu_ps(&fabs_mask._float[0]);
                  ^
In file included from xmm_quantize_sub.c:37:0:
/usr/lib/gcc/i686-w64-mingw32/4.9.0/include/xmmintrin.h:933:1: error: inlining failed in call to always_inline '_mm_loadu_ps': target specific option mismatch
 _mm_loadu_ps (float const *__P)
 ^
xmm_quantize_sub.c:65:18: error: called from here
     const __m128 vec_fabs_mask = _mm_loadu_ps(&fabs_mask._float[0]);
                  ^
--- lame/libmp3lame/vector/xmm_quantize_sub.c.orig	2014-06-08 12:16:19.455468042 -0700
+++ lame/libmp3lame/vector/xmm_quantize_sub.c	2014-06-08 12:16:09.592356980 -0700
@@ -35,6 +35,7 @@
 #ifdef HAVE_XMMINTRIN_H
 
 #include <xmmintrin.h>
+#pragma GCC target("sse")
 
 typedef union {
     int32_t _i_32[4]; /* unions are initialized by its first member */
@@ -124,6 +125,7 @@
 }
 
 
+#pragma GCC target("sse2")
 void
 fht_SSE2(FLOAT * fz, int n)
 {