Get ROCr and ROCt dependencies using cmake targets

Instead of detecting files (header/library), use cmake's find_package to
locate the required dependencies (hsa-runtime64 and hsakmt).

Adding hsa-runtime64::hsa-runtime64 and hsakmt::hsakmt to the
target_link_libraries also takes care of adding the interfaces include
directories to the search path.

Change-Id: I64eb77c97dac7982ac96d3158ad57df776cc0b53

src/CMakeLists.txt

@@ -35,5 +35,5 @@ set ( LIB_SRC
   ${LIB_DIR}/util/hsa_rsrc_factory.cpp
 )
 add_library ( ${TARGET_LIB} SHARED ${LIB_SRC} )
-target_include_directories ( ${TARGET_LIB} PRIVATE ${LIB_DIR} ${ROOT_DIR} ${HSA_RUNTIME_INC_PATH} ${HSA_KMT_LIB_PATH}/.. )
-target_link_libraries( ${TARGET_LIB} PRIVATE ${HSA_RUNTIME_LIB} c stdc++ )
+target_include_directories ( ${TARGET_LIB} PRIVATE ${LIB_DIR} ${ROOT_DIR} )
+target_link_libraries( ${TARGET_LIB} PRIVATE hsa-runtime64::hsa-runtime64 c stdc++ )