Revert "Only generate LICENSE files in Release builds"

This reverts commit 350ea99.

Since we a PR (brave/brave-core#4398) has been accidentaly merged
with incorrect licensing info, breaking all release builds, it
makes sense to ensure that these kinds of errors are detected
early, during development, instead of during CI.

lib/build.js

@@ -94,9 +94,7 @@ const build = (buildConfig = config.defaultBuildConfig, options) => {
   touchOverriddenFiles()
   touchOverriddenVectorIconFiles()
   util.updateBranding()
-  if (buildConfig === 'Release') {
-    licensing.updateLicenses()
-  }
+  licensing.updateLicenses()
 
   if (config.xcode_gen_target) {
     util.generateXcodeWorkspace()