Fix gyp files to allow ninja to build 64 bit on Mac.
Fix warnings that cropped up building as 64-bit.

BUG=
R=bsalomon@google.com, bungeman@google.com

Author: mtklein@google.com

Review URL: https://chromiumcodereview.appspot.com/13852013

git-svn-id: http://skia.googlecode.com/svn/trunk@8814 2bbb7eff-a529-9590-31e7-b0007b416f81
5 files changed