Bug 891049 - Only build Skia on x86, x86_64 and ARM target architectures r=khuey

configure.in

@@ -8137,7 +8137,14 @@ dnl Graphics checks.
 dnl ========================================================
 
 if test "${OS_TARGET}" = "WINNT" -o "${OS_ARCH}" = "Darwin" -o "${MOZ_WIDGET_TOOLKIT}" = "android" -o "${MOZ_WIDGET_TOOLKIT}" = "gtk2"; then
-MOZ_ENABLE_SKIA=1
+    case "${target_cpu}" in
+    i*86*|x86_64|arm)
+        MOZ_ENABLE_SKIA=1
+        ;;
+    *)
+        MOZ_ENABLE_SKIA=
+        ;;
+    esac
 else
 MOZ_ENABLE_SKIA=
 fi