Bug 880976: fix SSSE tests for controling libyuv asm disable (especially on arm) r=ted

configure.in

@@ -9189,8 +9189,10 @@ else
 fi
 
 # Don't try to compile ssse3/sse4.1 code if toolchain doesn't support
-if test -z "$HAVE_TOOLCHAIN_SUPPORT_SSSE3" || test -z "$HAVE_TOOLCHAIN_SUPPORT_MSSE4_1"; then
-  EXTRA_GYP_DEFINES="$EXTRA_GYP_DEFINES -D yuv_disable_asm=1"
+if test -n "$INTEL_ARCHITECTURE"; then
+  if test -z "$HAVE_TOOLCHAIN_SUPPORT_MSSSE3" -o -z "$HAVE_TOOLCHAIN_SUPPORT_MSSE4_1"; then
+    EXTRA_GYP_DEFINES="$EXTRA_GYP_DEFINES -D yuv_disable_asm=1"
+  fi
 fi
 
 if test -n "$MOZ_WEBRTC"; then