Purge the SkLiteDL freelist when PurgeAllCaches() is called.

src/core/SkGraphics.cpp

Index: src/core/SkGraphics.cpp
diff --git a/src/core/SkGraphics.cpp b/src/core/SkGraphics.cpp
index 01b1432ef0345ae3d99422f799ba9ff0d6982b3d..397d03bb81f0d3d66abd7be0abe13cc2c2e6ecab 100644
--- a/src/core/SkGraphics.cpp
+++ b/src/core/SkGraphics.cpp
@@ -14,6 +14,7 @@
 #include "SkGeometry.h"
 #include "SkGlyphCache.h"
 #include "SkImageFilter.h"
+#include "SkLiteDL.h"
 #include "SkMath.h"
 #include "SkMatrix.h"
 #include "SkOpts.h"
@@ -61,6 +62,7 @@ void SkGraphics::PurgeAllCaches() {
     SkGraphics::PurgeFontCache();
     SkGraphics::PurgeResourceCache();
     SkImageFilter::PurgeCache();
+    SkLiteDL::PurgeFreelist();
 }
 
 ///////////////////////////////////////////////////////////////////////////////