Update comments about debugging on master.

platform_tools/android/gyp_gen/makefile_writer.py

 #!/usr/bin/python
 
 # Copyright 2014 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """
 Functions for creating an Android.mk from already created dictionaries.
 """
@@ skipping 80 matching lines @@
 # using libskia must also be built with the debug version of the Skia headers.
 # There are a few scenarios where this comes into play:
 #
 # (1) You're building debug code that depends on libskia.
 #   (a) If libskia is built in release, then define SK_RELEASE when building
 #       your sources.
 #   (b) If libskia is built with debugging (see step 2), then no changes are
 #       needed since your sources and libskia have been built with SK_DEBUG.
 # (2) You're building libskia in debug mode.
 #   (a) RECOMMENDED: You can build the entire system in debug mode. Do this by
-#       updating your build/config.mk to include -DSK_DEBUG on the line that
-#       defines COMMON_GLOBAL_CFLAGS
+#       updating your build/core/config.mk to include -DSK_DEBUG on the line
+#       that defines COMMON_GLOBAL_CFLAGS
 #   (b) You can update all the users of libskia to define SK_DEBUG when they are
 #       building their sources.
 #
 # NOTE: If neither SK_DEBUG or SK_RELEASE are defined then Skia checks NDEBUG to
 #       determine which build type to use.
 ###############################################################################
 
 """
 )
 
@@ skipping 111 matching lines @@
       if data.condition:
         f.write('ifeq ($(%s), true)\n' % data.condition)
       write_local_vars(f, data.vars_dict, True, data.name)
       if data.condition:
         f.write('endif\n\n')
 
     write_include_stlport(f)
     f.write('include $(BUILD_SHARED_LIBRARY)\n')
     f.write(SKIA_TOOLS)