[gnome-control-center] build: use portable shell in configure.ac

[Bastien Nocera <hadess src gnome org>]

commit 3aa76db195a046ee18aad5a0b0fa680037af3a80
Author: Alexander Tsoy <alexander tsoy me>
Date:   Tue Dec 2 20:04:37 2014 +0300

    build: use portable shell in configure.ac
    
    https://bugzilla.gnome.org/show_bug.cgi?id=741035

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 074e858..dedaaea 100644
--- a/configure.ac
+++ b/configure.ac
@@ -560,7 +560,7 @@ if test "x$have_wacom" = "xyes"; then
 else
        AC_MSG_NOTICE([   Wacom panel disabled])
 fi
-if test "x$enable_ibus" == "xyes"; then
+if test "x$enable_ibus" = "xyes"; then
        AC_MSG_NOTICE([** IBus (Region panel IBus support)])
 else
        AC_MSG_NOTICE([   Region panel IBus support disabled])