lld test for configure & make

r210177 added lld Makefiles, r210245 added automatic build when the source is present.

This revision completes the set by adding the lld test and unittests to the check-all target.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210318 91177308-0d34-0410-b5e6-96231b3b80d8