Ensure dumpstate children die

Use prctl(PR_SET_PDEATHSIG, SIGKILL) in each forked child to ensure
it dies when dumpstate dies.

This is important for two cases:
- dumpstate runs a timer for each child process.  On expiration, it
  sends SIGTERM to kill the process.  Sometimes SIGTERM isn't enough
  to kill a hung process, so the child lives on.
- When dumpstate is killed by the user before completing, outstanding
  children continue to run and generate output.

Change-Id: I96e0dc918c26d56c9fee53611980ba2edd238712
fix mem leak on error handling

Change-Id: I40d8e371c46184aa701fa676246201a9d8f6e27d
Abort surface composition if hw surface is invalid

If an invalid display device is detected during surface composition
(e.g., a simulated secondary display is removed), abort the
composition.

Change-Id: Ia6afb2e287882d8ae0614eb25463d3f85b687adf
DisplayDevice: initialize mDisplayToken correctly

mDisplayToken should be initialized by displayToken.

Change-Id: I0a5fec1f1732200a32d10b1575239dceffe6dee4
Gfx-3d: fix GetProcAddress in egl extention

This patch can fix issue when Proc address return NULL.
Glbench10, egl-ext and conformance test need this patch to run pass.

Change-Id: I275c7cb6f77cb334c3ee7fa23cd696bba1c5a458
Author: Liuhui Lu <liuhui.lu@intel.com>
Signed-off-by: Shuo Gao <shuo.gao@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 52622
gl_code.cpp: Remove a DOS style newline

Change-Id: Id3edd6e511371fa8b0afef2e90baed4662ed76c4
Signed-off-by: Bernhard Rosenkränzer <Bernhard.Rosenkranzer@linaro.org>