CMake: setting CCache before calling the project command

as the comment and https://crascit.com/2016/04/09/using-ccache-with-cmake/
suggest, setting CCache should be done before project command,
because then CMake checks if the compiler can be invoked through CCache

CMakeLists.txt

@@ -16,6 +16,12 @@ if(COMMAND cmake_policy)
         cmake_policy(SET CMP0072 OLD)
     endif(POLICY CMP0072)
 endif(COMMAND cmake_policy)
+
+find_program(CCACHE_PROGRAM ccache)  #This check should occur before project()
+if(CCACHE_PROGRAM)
+    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_PROGRAM}")
+endif()
+
 project(FreeCAD)
 
 set(PACKAGE_VERSION_NAME "Vulcan")
@@ -27,11 +33,6 @@ set(FREECAD_VERSION "${PACKAGE_VERSION_MAJOR}.${PACKAGE_VERSION_MINOR}")
 set(PACKAGE_VERSION "${PACKAGE_VERSION_MAJOR}.${PACKAGE_VERSION_MINOR}.${PACKAGE_VERSION_PATCH}")
 set(PACKAGE_STRING "${PROJECT_NAME} ${PACKAGE_VERSION}")
 
-find_program(CCACHE_PROGRAM ccache)  #This check should occur before project()
-if(CCACHE_PROGRAM)
-    set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_PROGRAM}")
-endif()
-
 # include local  modules
 include(AddFileDependencies)
 include(cMake/FreeCadMacros.cmake)