Revert bug 1323303 to unbreak build on big-endian architectures.

--- toolkit/moz.configure.orig	2017-07-31 16:20:54 UTC
+++ toolkit/moz.configure
@@ -771,11 +771,11 @@
 # ==============================================================
 option('--disable-skia', help='Disable use of Skia')
 
-@depends('--disable-skia')
-def skia(value):
-    if not value:
-        die('--disable-skia is not supported anymore')
-    else:
+@depends('--disable-skia', target)
+def skia(value, target):
+    if value.origin == 'default' and target.endianness == 'big':
+        return None
+    if value:
         return True
 
 set_config('MOZ_ENABLE_SKIA', skia)
--- gfx/2d/ScaledFontBase.cpp.orig	2017-07-31 16:20:54 UTC
+++ gfx/2d/ScaledFontBase.cpp
@@ -212,14 +212,16 @@ ScaledFontBase::CopyGlyphsToBuilder(const GlyphBuffer 
     cairoPath->AppendPathToBuilder(builder);
     return;
   }
+#endif
+#ifdef USE_SKIA
   if (backendType == BackendType::RECORDING) {
     SkPath skPath = GetSkiaPathForGlyphs(aBuffer);
     RefPtr<Path> path = MakeAndAddRef<PathSkia>(skPath, FillRule::FILL_WINDING);
     path->StreamToSink(aBuilder);
     return;
   }
-  MOZ_ASSERT(false, "Path not being copied");
 #endif
+  MOZ_ASSERT(false, "Path not being copied");
 }
 
 void