[dconf] build: use portable shell in configure.ac

[Ryan Lortie <desrt src gnome org>]

commit 782eadfba090f8813846eae0194daddf316d06cc
Author: Alexander Tsoy <alexander tsoy me>
Date:   Tue Dec 2 20:10:37 2014 +0300

    build: use portable shell in configure.ac

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 6a974ad..980a04b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -66,7 +66,7 @@ AC_ARG_ENABLE(gcov,
               AC_HELP_STRING([--enable-gcov],
                              [enable generation of code coverage information]))
 
-if test "x$enable_gcov" == "xyes"; then
+if test "x$enable_gcov" = "xyes"; then
   CFLAGS="$CFLAGS -O0 -fprofile-arcs -ftest-coverage"
   LDFLAGS="$LDFLAGS -lgcov"
 fi