Allow cmake to be run multiple times in directed tests

Change-Id: I9d68fdefd9f72895ad4bdb310fcf3c6e52dbbf02


[ROCm/hip commit: 2e9adefd71]

projects/hip/tests/src/CMakeLists.txt

@@ -1,5 +1,7 @@
 cmake_minimum_required (VERSION 2.6)
 
+# remove CMAKE_CXX_COMPILER entry from cache since it will be pointing to hipcc
+unset(CMAKE_CXX_COMPILER CACHE)
 message (CMAKE_CXX_COMPILER = ${CMAKE_CXX_COMPILER} )
 
 project (HIP_Unit_Tests)