update BR's and configure flags

mate-settings-daemon.spec

@@ -15,6 +15,7 @@ BuildRequires:  dbus-glib-devel
 BuildRequires:  dconf-devel
 BuildRequires:  desktop-file-utils
 BuildRequires:  gtk2-devel
+BuildRequires:  libmatemixer-devel
 BuildRequires:  libcanberra-devel
 BuildRequires:  libmatekbd-devel
 BuildRequires:  libnotify-devel
@@ -53,7 +54,6 @@ under it.
    --disable-static                    \
    --disable-schemas-compile           \
    --enable-polkit                     \
-   --disable-gstreamer                 \
    --with-x                            \
    --with-nssdb                        \
    --with-gtk=2.0