Fix publish nightly on case sensitive FS (microsoft#23997)

Author: weswigham

Gulpfile.js

@@ -160,7 +160,7 @@ const generatedLCGFile = path.join(builtLocalDirectory, "enu", "diagnosticMessag
  *    2. 'src\compiler\diagnosticMessages.generated.json' => 'built\local\ENU\diagnosticMessages.generated.json.lcg'
  *       generate the lcg file (source of messages to localize) from the diagnosticMessages.generated.json
  */
-const localizationTargets = ["cs", "de", "es", "fr", "it", "ja", "ko", "pl", "pt-BR", "ru", "tr", "zh-CN", "zh-TW"]
+const localizationTargets = ["cs", "de", "es", "fr", "it", "ja", "ko", "pl", "pt-br", "ru", "tr", "zh-cn", "zh-tw"]
     .map(f => path.join(builtLocalDirectory, f, "diagnosticMessages.generated.json"))
     .concat(generatedLCGFile);
 

Jakefile.js

@@ -131,7 +131,7 @@ var generatedLCGFile = path.join(builtLocalDirectory, "enu", "diagnosticMessages
  *    2. 'src\compiler\diagnosticMessages.generated.json' => 'built\local\ENU\diagnosticMessages.generated.json.lcg'
  *       generate the lcg file (source of messages to localize) from the diagnosticMessages.generated.json
  */
-var localizationTargets = ["cs", "de", "es", "fr", "it", "ja", "ko", "pl", "pt-BR", "ru", "tr", "zh-CN", "zh-TW"].map(function (f) {
+var localizationTargets = ["cs", "de", "es", "fr", "it", "ja", "ko", "pl", "pt-br", "ru", "tr", "zh-cn", "zh-tw"].map(function (f) {
     return path.join(builtLocalDirectory, f);
 }).concat(path.dirname(generatedLCGFile));