part of Bug #245430 --> thunderbird static build support.

Get rid of the mail\config packaging of chrome into dist\thunderbird. Let the installer do it as part of the
packaging process.

This means we can get rid of the thunderbird installer ifdefs to look in dist\thunderbird instead of dist\bin.

toolkit/mozapps/installer/windows/wizard/setup/extra.c

@@ -3171,11 +3171,7 @@ void GetXpinstallPath(char *aPath, int aPathBufSize)
   {
     MozCopyStr(siCFXpcomFile.szDestination, aPath, aPathBufSize);
     AppendBackSlash(aPath, aPathBufSize);
-#ifdef MOZ_THUNDERBIRD
-    lstrcat(aPath, "thunderbird");
-#else
     lstrcat(aPath, "bin");
-#endif
   }
   else
     MozCopyStr(gGre.homePath, aPath, aPathBufSize);

toolkit/mozapps/installer/windows/wizard/setup/ifuncns.c

@@ -521,11 +521,7 @@ HRESULT ProcessXpcomFile()
   lstrcpy(szDestination, siCFXpcomFile.szDestination);
   AppendBackSlash(szDestination, sizeof(szDestination));
 
-#ifdef MOZ_THUNDERBIRD
-  lstrcat(szDestination, "thunderbird");
-#else
   lstrcat(szDestination, "bin");
-#endif
 
   FileCopy(szSource, szDestination, TRUE, FALSE);
   return(FO_SUCCESS);