kfdtest: Update CMake message on LLVM build search

Old CMake message was misleading, update to reflect what it's actually
doing.

Signed-off-by: Graham Sider <Graham.Sider@amd.com>
Change-Id: I8fd18a9095ea350cc10494b4382706027b447ba3

tests/kfdtest/CMakeLists.txt

@@ -105,8 +105,8 @@ find_path( LIGHTNING_CMAKE_DIR NAMES LLVMConfig.cmake
 if ( DEFINED LIGHTNING_CMAKE_DIR AND EXISTS ${LIGHTNING_CMAKE_DIR} )
     set ( LLVM_DIR ${LIGHTNING_CMAKE_DIR} )
 else()
-    message( WARNING "Couldn't find Lightning build. "
-        "Attempting to use system LLVM install..." )
+    message( STATUS "Couldn't find Lightning build in compute directory. "
+        "Searching LLVM_DIR then defaulting to system LLVM install if still not found..." )
 endif()
 
 find_package( LLVM REQUIRED CONFIG )