Add the lit site config for unittests to bin/llvm-lit

This missing parameter was causing bin/llvm-lit to run the unittests
from my primary build directory instead of my self-hosting build
directory because llvm-config was on my PATH.

This more closely matches what 'make check' will pass to lit.py.

llvm-svn: 197444

llvm/utils/llvm-lit/llvm-lit.in

@@ -15,6 +15,8 @@ sys.path.insert(0, os.path.join(llvm_source_root, 'utils', 'lit'))
 builtin_parameters = {
     'build_mode' : "@CMAKE_CFG_INTDIR@",
     'llvm_site_config' : os.path.join(llvm_obj_root, 'test', 'lit.site.cfg')
+    'llvm_unit_site_config' : os.path.join(llvm_obj_root, 'test', 'Unit',
+                                           'lit.site.cfg')
     }
 
 clang_obj_root = os.path.join(llvm_obj_root, 'tools', 'clang')