[Build] Move diagnostic translations from include to dedicated localization/ directory

Author: xedin

CMakeLists.txt

@@ -1109,6 +1109,8 @@ if(SWIFT_INCLUDE_TOOLS)
   add_subdirectory(tools)
 endif()
 
+add_subdirectory(localization)
+
 add_subdirectory(utils)
 
 add_subdirectory(userdocs)

localization/CMakeLists.txt

@@ -0,0 +1,14 @@
+add_custom_target(diagnostic-translation-database)
+
+add_custom_command(
+  TARGET diagnostic-translation-database
+  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+  DEPENDS diagnostics
+  COMMAND "${CMAKE_COMMAND}" -E copy_directory diagnostics/ "${SWIFT_BINARY_DIR}/share/swift/diagnostics/")
+
+add_dependencies(swift-frontend diagnostic-translation-database)
+
+swift_install_in_component(
+  DIRECTORY diagnostics
+  DESTINATION "share/swift"
+  COMPONENT compiler)