Extract wxLOCALE_XXX constants into their own header

No real changes, just make it possible to use these constants without
including the entire wx/intl.h.

Note that the existing headers including wx/intl.h need to keep
including it, unfortunately, as not doing it any longer would break
compilation of any code including them which relies on _() or
wxGetTranslation() being defined after including e.g. wx/dc.h. This was,
of course, never guaranteed, but in practice it worked for a very long
time, so don't break it now.

This commit is best viewed with --color-moved git option.

build/bakefiles/files.bkl

@@ -735,6 +735,7 @@ IMPORTANT: please read docs/tech/tn0016.txt before modifying this file!
     wx/generic/fswatcher.h
     wx/secretstore.h
     wx/lzmastream.h
+    wx/localedefs.h
 </set>
 
 

build/cmake/files.cmake

@@ -651,6 +651,7 @@ set(BASE_CMN_HDR
     wx/fswatcher.h
     wx/generic/fswatcher.h
     wx/lzmastream.h
+    wx/localedefs.h
 )
 
 set(NET_UNIX_SRC

build/files

@@ -574,6 +574,7 @@ BASE_CMN_HDR =
     wx/link.h
     wx/list.h
     wx/listimpl.cpp
+    wx/localedefs.h
     wx/log.h
     wx/longlong.h
     wx/lzmastream.h

build/msw/wx_base.vcxproj

@@ -823,6 +823,7 @@
     <ClInclude Include="..\..\include\wx\secretstore.h" />
     <ClInclude Include="..\..\include\wx\evtloopsrc.h" />
     <ClInclude Include="..\..\include\wx\lzmastream.h" />
+    <ClInclude Include="..\..\include\wx\localedefs.h" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">

build/msw/wx_base.vcxproj.filters

@@ -598,6 +598,9 @@
     <ClInclude Include="..\..\include\wx\listimpl.cpp">
       <Filter>Common Headers</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\include\wx\localedefs.h">
+      <Filter>Common Headers</Filter>
+    </ClInclude>
     <ClInclude Include="..\..\include\wx\log.h">
       <Filter>Common Headers</Filter>
     </ClInclude>

build/msw/wx_vc8_base.vcproj

@@ -2103,6 +2103,10 @@
 				RelativePath="..\..\include\wx\list.h"
 				>
 			</File>
+			<File
+				RelativePath="..\..\include\wx\localedefs.h"
+				>
+			</File>
 			<File
 				RelativePath="..\..\include\wx\log.h"
 				>

build/msw/wx_vc9_base.vcproj

@@ -2099,6 +2099,10 @@
 				RelativePath="..\..\include\wx\list.h"
 				>
 			</File>
+			<File
+				RelativePath="..\..\include\wx\localedefs.h"
+				>
+			</File>
 			<File
 				RelativePath="..\..\include\wx\log.h"
 				>