honor CMake 3.5 target property IOS_INSTALL_COMBINED

CMake/cotire.cmake

@@ -2976,7 +2976,8 @@ function (cotire_setup_unity_build_target _languages _configurations _target)
 	cotire_copy_set_properites("${_configurations}" TARGET ${_target} ${_unityTargetName}
 		BUNDLE BUNDLE_EXTENSION FRAMEWORK FRAMEWORK_VERSION INSTALL_NAME_DIR
 		MACOSX_BUNDLE MACOSX_BUNDLE_INFO_PLIST MACOSX_FRAMEWORK_INFO_PLIST MACOSX_RPATH
-		OSX_ARCHITECTURES OSX_ARCHITECTURES_<CONFIG> PRIVATE_HEADER PUBLIC_HEADER RESOURCE XCTEST)
+		OSX_ARCHITECTURES OSX_ARCHITECTURES_<CONFIG> PRIVATE_HEADER PUBLIC_HEADER RESOURCE XCTEST
+		IOS_INSTALL_COMBINED)
 	# copy Windows platform specific stuff
 	cotire_copy_set_properites("${_configurations}" TARGET ${_target} ${_unityTargetName}
 		GNUtoMS