Add back a FIXME note to lit.cfg.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@226703 91177308-0d34-0410-b5e6-96231b3b80d8

test/lit.cfg

@@ -313,6 +313,7 @@ for pattern in [r"\bFileCheck\b",
                 NoPreHyphenDot + r"\bclang-check\b" + NoPostHyphenDot,
                 NoPreHyphenDot + r"\bclang-format\b" + NoPostHyphenDot,
                 NoPreHyphenDot + r"\bclang-interpreter\b" + NoPostHyphenDot,
+                # FIXME: Some clang test uses opt?
                 NoPreHyphenDot + r"\bopt\b" + NoPostBar + NoPostHyphenDot,
                 # Handle these specially as they are strings searched
                 # for during testing.