[analyzer] SATestBuild.py: allow make builds to disable parallelization

Before, SATestBuild unilaterally added '-j<n>' to every project built with
'make'. Now, we check and see if there's a -j option already specified, which
allows a project to explicitly be marked '-j1'.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@168603 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed