Merging r182253:

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r182253 | jholewinski | 2013-05-20 05:13:28 -0700 (Mon, 20 May 2013) | 1 line

[NVPTX] Fix i1 kernel parameters and global variables.  ABI rules say we need to use .u8 for i1 parameters for kernels.
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llvm-svn: 182825