Build Skia as a static library

- Roll GYP so that we get non-thin archives on Linux
- Add merge_static_libs.py
- Add skia_core_lib target which builds core, ports, opts*, and utils
- Replace dependencies on core/ports/opts/utils with skia_core_libs
- Rename exportable libraries with "skia_"
Review URL: https://codereview.appspot.com/6619049

git-svn-id: http://skia.googlecode.com/svn/trunk@5889 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/DEPS b/DEPS
index 10dbd41..016213e 100644
--- a/DEPS
+++ b/DEPS
@@ -9,7 +9,7 @@
 #
 deps = {
   "third_party/externals/angle" : "http://angleproject.googlecode.com/svn/trunk@1268",
-  "third_party/externals/gyp" : "http://gyp.googlecode.com/svn/trunk@1509",
+  "third_party/externals/gyp" : "http://gyp.googlecode.com/svn/trunk@1517",
   "third_party/externals/libjpeg" : "http://src.chromium.org/svn/trunk/src/third_party/libjpeg@125399",
   "third_party/externals/jsoncpp" : "http://src.chromium.org/svn/trunk/src/third_party/jsoncpp@125399",
   "third_party/externals/jsoncpp/source/include" : "http://jsoncpp.svn.sourceforge.net/svnroot/jsoncpp/trunk/jsoncpp/include@248",