fix handling of CMAKE_INCLUDE_FLAG_SEP_* variables

CMake/cotire.cmake

@@ -902,16 +902,16 @@ function (cotire_add_includes_to_cmd _cmdVar _language _includesVar _systemInclu
 		foreach (_include ${_includeDirs})
 			if (WIN32 AND CMAKE_${_language}_COMPILER_ID MATCHES "MSVC|Intel")
 				file (TO_NATIVE_PATH "${_include}" _include)
-				list (APPEND ${_cmdVar} "${CMAKE_INCLUDE_FLAG_${_language}}${CMAKE_INCLUDE_FLAG_${_language}_SEP}${_include}")
+				list (APPEND ${_cmdVar} "${CMAKE_INCLUDE_FLAG_${_language}}${CMAKE_INCLUDE_FLAG_SEP_${_language}}${_include}")
 			else()
 				set (_index -1)
 				if ("${CMAKE_INCLUDE_SYSTEM_FLAG_${_language}}" MATCHES ".+")
 					list (FIND ${_systemIncludesVar} "${_include}" _index)
 				endif()
 				if (_index GREATER -1)
-					list (APPEND ${_cmdVar} "${CMAKE_INCLUDE_SYSTEM_FLAG_${_language}}${_include}")
+					list (APPEND ${_cmdVar} "${CMAKE_INCLUDE_SYSTEM_FLAG_${_language}}${CMAKE_INCLUDE_FLAG_SEP_${_language}}${_include}")
 				else()
-					list (APPEND ${_cmdVar} "${CMAKE_INCLUDE_FLAG_${_language}}${CMAKE_INCLUDE_FLAG_${_language}_SEP}${_include}")
+					list (APPEND ${_cmdVar} "${CMAKE_INCLUDE_FLAG_${_language}}${CMAKE_INCLUDE_FLAG_SEP_${_language}}${_include}")
 				endif()
 			endif()
 		endforeach()
@@ -2191,7 +2191,7 @@ function (cotire_generate_target_script _language _configurations _target _targe
 		XCODE MSVC CMAKE_GENERATOR CMAKE_BUILD_TYPE CMAKE_CONFIGURATION_TYPES
 		CMAKE_${_language}_COMPILER_ID CMAKE_${_language}_COMPILER_VERSION
 		CMAKE_${_language}_COMPILER_LAUNCHER CMAKE_${_language}_COMPILER CMAKE_${_language}_COMPILER_ARG1
-		CMAKE_INCLUDE_FLAG_${_language} CMAKE_INCLUDE_FLAG_${_language}_SEP
+		CMAKE_INCLUDE_FLAG_${_language} CMAKE_INCLUDE_FLAG_SEP_${_language}
 		CMAKE_INCLUDE_SYSTEM_FLAG_${_language}
 		CMAKE_${_language}_FRAMEWORK_SEARCH_FLAG
 		CMAKE_${_language}_SYSTEM_FRAMEWORK_SEARCH_FLAG