[tests] Add support for a link_flags lit parameter.  - This is useful for testing with custom ABI libraries.  - Patch by Michael van der Westhuizen.
[tests] Add support for a link_flags lit parameter.  - This is useful for testing with custom ABI libraries.  - Patch by Michael van der Westhuizen.

git-svn-id: 273b07cebdae5845b4a75aae04570b978db9eb50@174997 91177308-0d34-0410-b5e6-96231b3b80d8

lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx,lodyagin/bare_cxx