CMakeLists.txt: FORCE the default of CMAKE_BUILD_TYPE to Release

The existing logic to default the CMAKE_BUILT_TYPE to Release did not
actually work without the FORCE parameter on the set().

git-svn-id: https://llvm.org/svn/llvm-project/test-suite/trunk@292686 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed