Move SkTHash.h to include/private.

include/views/SkOSWindow_Win.h includes it.

To move SkTHash.h to include/private, SkChecksum.h needs to go there too.  To move SkChecksum.h to include/private, SkTLogic needs to go there too.

This adds a bunch of -Iinclude/private to tools.gyp I missed in the last CL.

No public API changes.
TBR=reed@google.com

BUG=skia:4126

Review URL: https://codereview.chromium.org/1260613006
7 files changed