PushCheckStateTest: Update test to check CMAKE_EXTRA_INCLUDE_FILES

Tests/CMakeTests/PushCheckStateTest.cmake.in

@@ -1,5 +1,6 @@
 include(CMakePushCheckState)
 
+set(CMAKE_EXTRA_INCLUDE_FILES file1)
 set(CMAKE_REQUIRED_INCLUDES dir1)
 set(CMAKE_REQUIRED_DEFINITIONS defs1 )
 set(CMAKE_REQUIRED_LIBRARIES lib1)
@@ -8,6 +9,7 @@ set(CMAKE_REQUIRED_QUIET 1)
 
 cmake_push_check_state()
 
+set(CMAKE_EXTRA_INCLUDE_FILES file2)
 set(CMAKE_REQUIRED_INCLUDES dir2)
 set(CMAKE_REQUIRED_DEFINITIONS defs2)
 set(CMAKE_REQUIRED_LIBRARIES lib2)
@@ -16,6 +18,7 @@ set(CMAKE_REQUIRED_QUIET 2)
 
 cmake_push_check_state()
 
+set(CMAKE_EXTRA_INCLUDE_FILES file3)
 set(CMAKE_REQUIRED_DEFINITIONS defs3)
 set(CMAKE_REQUIRED_INCLUDES dir3)
 set(CMAKE_REQUIRED_DEFINITIONS defs3)
@@ -26,6 +29,7 @@ set(CMAKE_REQUIRED_QUIET 3)
 cmake_pop_check_state()
 
 foreach(pair IN ITEMS
+  EXTRA_INCLUDE_FILES|file2
   REQUIRED_INCLUDES|dir2
   REQUIRED_DEFINITIONS|defs2
   REQUIRED_LIBRARIES|lib2
@@ -44,6 +48,7 @@ endforeach()
 cmake_pop_check_state()
 
 foreach(pair IN ITEMS
+  EXTRA_INCLUDE_FILES|file1
   REQUIRED_INCLUDES|dir1
   REQUIRED_DEFINITIONS|defs1
   REQUIRED_LIBRARIES|lib1