configure.ac: move AC_MSG_RESULT reporting back into the m4 macro

The one who does AC_MSG_CHECKING should provide the AC_MSG_RESULT.

Fixes: ced9425327 (configure: Introduce new output variable to
ax_check_python_mako_module.m4"

Cc: "10.5" <mesa-stable@lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89328
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>

m4/ax_check_python_mako_module.m4

@@ -54,8 +54,10 @@ else:
     " | $PYTHON2 -
 
     if test $? -ne 0 ; then
+       AC_MSG_RESULT(no)
        AC_SUBST(acv_mako_found, 'no')
     else
+       AC_MSG_RESULT(yes)
        AC_SUBST(acv_mako_found, 'yes')
     fi
 ])