built-ins: echo: Import '(gash compat)'.

* gash/built-ins/echo.scm: Import '(gash compat)'.

gash/built-ins/echo.scm

@@ -18,6 +18,7 @@
 ;;; along with Gash.  If not, see <http://www.gnu.org/licenses/>.
 
 (define-module (gash built-ins echo)
+  #:use-module (gash compat)
   #:use-module (ice-9 match)
   #:use-module (srfi srfi-1)
   #:use-module (srfi srfi-26))