gst-fsl-plugins: add missing librt linking for libgstfsl.

Fixes runtime failure of gst-fsl-plugins, e.g.

(gst-plugin-scanner:1700): GStreamer-WARNING **: Failed to load
        plugin '/usr/lib/gstreamer-0.10/libmfw_vpu.so':
        /usr/lib/libgstfsl-0.10.so.0: undefined symbol: shm_open)

when compiled with buildroot/glibc toolchain.

See also old buildroot mailing list request [1].

[1] http://lists.busybox.net/pipermail/buildroot/2013-June/073910.html

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Update for 2014.02-rc3

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Merge remote-tracking branch 'mirror/master'
rpi-userland: build wayland support when wayland is selected
dawn: adding sdk and update qt5 eglfs hook
dawn-sdk: correctly make paths in staging
dawn-sdk: adding correct egl, gles and vg flags in buildroot
qt5base: correctly configure dawn-sdk build
rpi: adding wifi support in defconfigs
qt5webkit: only build video support when gstreamer has been selected
weston-launch requires linux-pam

The weston package should select the BR2_PACKAGE_LINUX_PAM package since linux-pam
is required when building weston-launch.

Aslo clean up the Weston configuration flags a bit.
WebKitGTK+ should look for rpi-userland EGL and GLES2 headers

WebKitGTK+ doesn't use pkg-config to locate EGL and GLESv2 headers but just
runs compilation tests to see if they're located in CFLAGS or CXXFLAGS.
Buildroot package should adjust WebKitGTK+ rules to that, utilizing pkg-config
to establish the rpi-userland staging installation that includes the necessary
headers.
WebKitGTK+ shouldn't build the WebKit1 layer

The focus is on WebKit2.
Add rpi_webkitgtk_defconfig

The rpi_webkitgtk_defconfig make target is added so it's easy to set up the
buildroot configuration to build WebKitGTK+ for Wayland.