gstreamer1.0: Fix reproducibility issue around libcap

gstreamer1.0: Fix reproducibility issue around libcap

Currently gstreamer configuration depends libcap and on whether
setcap is found on the host system.

Removing libcap from DEPENDS and only use it when the 'setcap' is enabled.

    * 0004-capfix.patch
      Removed as the same goals can be achieved only with the PACKAGECONFIG 'setcap'

Signed-off-by: Jose Quaresma <quaresma.jose@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>