1.Make directed_test apps linked against static libs
of hip, rocclr, rocr, roct and amd_comgr.
2.Remove custom_target amdhip64_static_combiner.
3.Support EXCLUDE_HIP_LIB_TYPE <static|shared>.
4.Simplify argument list parsing.
5.Fix hip_pch.o missing issue in samples' build.
6.Fix some original small bugs.
Change-Id: I30f5e65367613152ce86b80b13e1c9f2a28da803
Tao Sang
Sudheer Kumar