Current parsing allows trailing string after the permitted value, MANDATORY|DISABLED|DEFAULT -- e.g., "mandatorynot" is also recognized as "MANDATORY". Such cases should be recognized as incorrect/unknown value. Differential Revision: https://reviews.llvm.org/D62431 git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@362125 91177308-0d34-0410-b5e6-96231b3b80d8