Clean up the ANGLE Xcode project.
Rubber-stamped by Adele Peterson.
Main changes include:
• Adding a Production configuration.
• Modifying the library name from libangle.a to libANGLE.a.
• Installing the headers in a subdirectory of /usr/local/include to avoid polluting the top-level directory.
• Generating derived sources in to the built products directory so they're saved along with the symroot.
• Switching to using .xcconfig files for maximum cleanliness.
* ANGLE.xcodeproj/project.pbxproj:
* Configurations/ANGLE.xcconfig: Added.
* Configurations/Base.xcconfig: Added.
* Configurations/DebugRelease.xcconfig: Added.
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@64597
268f45cc-cd09-0410-ab3c-
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