Replace external/skia path to new repository android_external_skia

Change-Id: I095ece87b847ce38cfa380747712826ceae519e0

default.xml

@@ -214,7 +214,7 @@
   <project path="external/sepolicy" name="android_external_sepolicy" remote="omnirom" revision="android-4.4" />
   <project path="external/sfntly" name="platform/external/sfntly" />
   <project path="external/sil-fonts" name="platform/external/sil-fonts" />
-  <project path="external/skia" name="platform/external/skia" />
+  <project path="external/skia" name="android_external_skia" remote="omnirom" revision="android-4.4" />
   <project path="external/smack" name="platform/external/smack" />
   <project path="external/smali" name="platform/external/smali" />
   <project path="external/sonivox" name="platform/external/sonivox" groups="pdk" />