Added "Michael Park" to `CREDITS.TXT`.

Summary: Test commit + give myself credit.

Reviewers: EricWF

Differential Revision: https://reviews.llvm.org/D28431

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291344 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed