[MinGW] Remove stray/inconsistent comment chars in test file. NFC.
[MinGW] Remove stray/inconsistent comment chars in test file. NFC.

Test directives don't need to be in comments in this file.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@368814 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld