[analyzer] Perl scripts are run differently from makefiles. Sometimes additional utilities are involved, e.g. 'env' utility that present in MSYS but is missing in MinGW. The patch unifies launch of "c++-analyzer" and "ccc-analyzer".

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@219812 91177308-0d34-0410-b5e6-96231b3b80d8