[xray] Remove cl::sub from alias options
Currently running the xray tools generates a number of errors:
$ ./bin/llvm-xray
: for the -k option: cl::alias must not have cl::sub(), aliased option's cl::sub() will be used!
: for the -d option: cl::alias must not have cl::sub(), aliased option's cl::sub() will be used!
: for the -o option: cl::alias must not have cl::sub(), aliased option's cl::sub() will be used!
: for the -f option: cl::alias must not have cl::sub(), aliased option's cl::sub() will be used!
: for the -s option: cl::alias must not have cl::sub(), aliased option's cl::sub() will be used!
: for the -r option: cl::alias must not have cl::sub(), aliased option's cl::sub() will be used!
: for the -p option: cl::alias must not have cl::sub(), aliased option's cl::sub() will be used!
: for the -m option: cl::alias must not have cl::sub(), aliased option's cl::sub() will be used!
<snip>
Patch by Ryan Mansfield.
Differential Revision: https://reviews.llvm.org/D69386