Enable skia asserts. They were disabled some time ago due to...

skia/ext/SkFontHost_fontconfig.cpp

 /* libs/graphics/ports/SkFontHost_fontconfig.cpp
 **
 ** Copyright 2008, Google Inc.
 **
 ** Licensed under the Apache License, Version 2.0 (the "License");
 ** you may not use this file except in compliance with the License.
 ** You may obtain a copy of the License at
 **
 **     http://www.apache.org/licenses/LICENSE-2.0
 **
@@ skipping 63 matching lines @@
 }
 
 static SkTypeface::Style UniqueIdToStyle(unsigned uniqueid)
 {
     return static_cast<SkTypeface::Style>(uniqueid & 0xff);
 }
 
 static unsigned FileIdAndStyleToUniqueId(unsigned fileid,
                                          SkTypeface::Style style)
 {
-    SkASSERT(style & 0xff == style);
+    SkASSERT((style & 0xff) == style);
     return (fileid << 8) | static_cast<int>(style);
 }
 
 static const unsigned kRemoteFontMask = 0x00800000u;
 
 static bool IsRemoteFont(unsigned fileid)
 {
     return fileid & kRemoteFontMask;
 }
 
@@ skipping 213 matching lines @@
     return SkNEW_ARGS(SkFileDescriptorStream, (fd));
 }
 
 size_t SkFontHost::ShouldPurgeFontCache(size_t sizeAllocatedSoFar)
 {
     if (sizeAllocatedSoFar > kFontCacheMemoryBudget)
         return sizeAllocatedSoFar - kFontCacheMemoryBudget;
     else
         return 0;   // nothing to do
 }