[llvm-commits] script for updating LLVM + Clang from anywhere in the tree

[Zhanyong Wan (λx.x x)]

Hi,

I have a script for updating both LLVM and Clang source trees to a
given revision, from anywhere in either of the trees.

USAGE:
    upllvm.py         # Updates to HEAD.
    upllvm.py 12345   # Updates to r12345.
    upllvm.py r12345  # The same as the previous command.

Could someone review the patch?  Thanks,
-- 
Zhanyong
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