cmake: use new syntax to utilize ccache

Author: flpflan

CMakeLists.txt

@@ -9,8 +9,8 @@ set(CMAKE_POSITION_INDEPENDENT_CODE ON CACHE BOOL "" FORCE)
 # Configure CCache if available
 find_program(CCACHE_PROGRAM ccache)
 if(CCACHE_PROGRAM)
-    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
-    set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
+    set(CMAKE_C_COMPILER_LAUNCHER ${CCACHE_PROGRAM})
+    set(CMAKE_CXX_COMPILER_LAUNCHER ${CCACHE_PROGRAM})
 endif()
 
 # ===== Options =====