Introduce Go coding standards for LLVM.
Introduce Go coding standards for LLVM.

Rather than define our own standards, we adopt a set of best practices that
are already in use by the Go community.

Differential Revision: http://reviews.llvm.org/D5761

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@219646 91177308-0d34-0410-b5e6-96231b3b80d8

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