fix inclusion of FPHSA

Make sure these modules also include exactly the version shipped with CMake.

Modules/FindBacktrace.cmake

@@ -44,7 +44,7 @@
 
 include(CMakePushCheckState)
 include(CheckSymbolExists)
-include(FindPackageHandleStandardArgs)
+include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
 
 # List of variables to be provided to find_package_handle_standard_args()
 set(_Backtrace_STD_ARGS Backtrace_INCLUDE_DIR)

Modules/FindIce.cmake

@@ -334,7 +334,7 @@ endfunction()
 
 _Ice_FIND()
 
-include(FindPackageHandleStandardArgs)
+include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
 FIND_PACKAGE_HANDLE_STANDARD_ARGS(Ice
                                   FOUND_VAR Ice_FOUND
                                   REQUIRED_VARS Ice_SLICE2CPP_EXECUTABLE

Modules/FindSquish.cmake

@@ -201,7 +201,7 @@ else()
 endif()
 
 # record if Squish was found
-include(FindPackageHandleStandardArgs)
+include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
 find_package_handle_standard_args(Squish  REQUIRED_VARS  SQUISH_INSTALL_DIR SQUISH_CLIENT_EXECUTABLE SQUISH_SERVER_EXECUTABLE
                                           VERSION_VAR  SQUISH_VERSION )
 

Modules/FindXerces.cmake

@@ -70,7 +70,7 @@ if(Xerces_INCLUDE_DIR)
   _Xerces_GET_VERSION("${Xerces_INCLUDE_DIR}/xercesc/util/XercesVersion.hpp")
 endif()
 
-include(FindPackageHandleStandardArgs)
+include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
 FIND_PACKAGE_HANDLE_STANDARD_ARGS(Xerces
                                   FOUND_VAR Xerces_FOUND
                                   REQUIRED_VARS Xerces_LIBRARY