Move FontConfig factory into separate file.

src/ports/SkFontMgr_fontconfig_factory.cpp

Index: src/ports/SkFontMgr_fontconfig_factory.cpp
diff --git a/src/ports/SkFontMgr_win_dw_factory.cpp b/src/ports/SkFontMgr_fontconfig_factory.cpp
similarity index 72%
copy from src/ports/SkFontMgr_win_dw_factory.cpp
copy to src/ports/SkFontMgr_fontconfig_factory.cpp
index 85ed56d695bd231008dc15fed3bb386b129b7b41..b959acbbe2c2f064c7e4f54b218c69c8d32a9935 100644
--- a/src/ports/SkFontMgr_win_dw_factory.cpp
+++ b/src/ports/SkFontMgr_fontconfig_factory.cpp
@@ -6,8 +6,8 @@
  */
 
 #include "SkFontMgr.h"
-#include "SkTypeface_win.h"
+#include "SkFontMgr_fontconfig.h"
 
 SkFontMgr* SkFontMgr::Factory() {
-    return SkFontMgr_New_DirectWrite();
+    return SkFontMgr_New_FontConfig(NULL);
 }