CMAKE - Default to lib instead of lib64

Change-Id: Ib21d41018b091d92c2ed408ff0c4d28e6a74c903
Signed-off-by: Galantsev, Dmitrii <dmitrii.galantsev@amd.com>

CMakeLists.txt

@@ -14,6 +14,9 @@ endif()
 ## Include common cmake modules
 include(utils)
 
+# Default libdir to "lib", this skips GNUInstallDirs from trying to take a guess if it's unset:
+set(CMAKE_INSTALL_LIBDIR "lib" CACHE STRING "Library install directory")
+
 if (NOT DEFINED CPACK_RESOURCE_FILE_LICENSE)
     set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_SOURCE_DIR}/License.txt")
 endif()