[PATCH] [FileCheck] Fix a bug that cause FileCheck to misidentify check-prefix

[Ron Ofir]

  Apart from a single test which used a number as the check-prefix, all failing tests are because of lack of converntions: While almost all cases use the check-prefix they provide in the command line as the check prefix, some use it with an additional "CHECK-" prefix (i.e using CHECK-X64 as the actual prefix while passing X64 as the command line argument).
  In what way should this be fixed? Should I change the tests themselves or have FileCheck check for "CHECK-" also?

http://llvm-reviews.chandlerc.com/D1271