[Frontend] The macro that describes the Objective-C bool type should
be defined for non Objective-C code as well

rdar://29794915

Differential Revision: https://reviews.llvm.org/D28349

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@292617 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit 4c459707fd74752d8c74e009dbd8983c7050ffa5)
3 files changed