tcuX11: fix to wait for matching ConfigureNotify

tcuX11: fix to wait for matching ConfigureNotify

Patch adds a loop to setDimensions that spins until exact
matching ConfigureNotify event is caught. This is done to make
sure X has updated the window size before we get further.

New processEvent method is added so that we can handle possible
WM_DELETE_WINDOW message during the loop as suggested by Pyry.

Test: run dEQP-EGL.functional.resize* on different configurations

Change-Id: Ic32243e9b25ea6cbdb5a7ab6bfccc7a196f1a5b8
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>