OMX: Add OMX_ImageFilterDeInterlaceFast option
Add MMAL callbacks for various camera parameters

Add MMAL support for OMX_IndexConfigCameraSettings which
allows reporting of parameters such as exposure, analog gain,
digital gain, AWB values, and focus position back to the app
as they change.

Not quite complete as this requires the port to be the control
port (OMX_ALL), and that uses the video Camplus stats. You can
manually request the values from the stills port, if desired.

NB Updates both MMAL and IL headers
Add MMAL parameter for privacy indicator control
Add MMAL parameter for render stats
Build libvcsm and vcsmem test utility

Add experimental VCSM support to the ALL_APPS build. mmal-play
seems to work but until VCSM is verified don't make MMAL depend on VCSM
because this might require makefile updates for other projects.
Raspistill: Add support for requesting camera settings (--settings)

New option that asks the GPU to send events whenever the camera
settings parameter changes. That contains exposure, analog and
digital gains, AWB gains, and focus position.
Change the requested frame rate on longer exposure times

Allows selection of the longer exposure sensor modes.
Merge pull request #189 from 6by9/PR-20140725

Raspistill options for camera settings, and for long exposure modes
userland: egl: Call khrn_init_options so env vars like V3D_DOUBLE_BUFFER are respected
Sync with upstream