[Attributor][Fix] Ensure the attribute names are created properly
[Attributor][Fix] Ensure the attribute names are created properly

The names of the attributes were not always created properly which
caused problems with the yaml output.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@370956 91177308-0d34-0410-b5e6-96231b3b80d8

GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm