Updating build script to generate spdx.txt

.gitmodules

@@ -1,3 +1,3 @@
-[submodule "app/license-list"]
-	path = app/license-list
-	url = https://github.com/spdx/license-list-data.git
+[submodule "license-list"]
+	path = license-list
+	url = https://github.com/spdx/license-list-data

tasks/license-list.js

@@ -3,10 +3,16 @@ import gulpif from 'gulp-if'
 import livereload from 'gulp-livereload'
 import args from './lib/args'
 var fs = require('fs');
-
-
+var exec = require('child_process').exec;
+ 
 gulp.task('license-list', () => {
-  return gulp.src(['app/license-list/spdx.txt','app/license-list/text/*.txt'])
+  process.chdir('license-list/text')
+  exec('ls *.txt > ../spdx.txt', function (err, stdout, stderr) {
+    console.log(stdout);
+    console.log(stderr);
+  });
+  process.chdir('../..')
+  return gulp.src(['license-list/spdx.txt','license-list/text/*.txt'])
     .pipe(gulp.dest(`dist/${args.vendor}/license-list`))
     .pipe(gulpif(args.watch, livereload()))
 })