Backport LESS repo fix

tasks/admin/distributions/create.js

@@ -176,6 +176,9 @@ module.exports = function(callback) {
           definitions = gulp.src('src/definitions/**/*', { base: 'src/' })
             .pipe(gulp.dest(outputDirectory))
           ;
+          themeImport = gulp.src('src/semantic.less', { base: 'src/' })
+            .pipe(gulp.dest(outputDirectory))
+          ;
           themeImport = gulp.src('src/theme.less', { base: 'src/' })
             .pipe(gulp.dest(outputDirectory))
           ;