tests: build fix
configure: change version to 1.7.2
fusion: do not sync when shutting down (dispatcher is already stopped)
Revert "Core: Fix stereo updates (don't dispatch from layer function)"

(this is only working with internal surface clients in 1.8)

This reverts commit 7bf5fc3591fa6661363c70f4e1ce71010f216ff6.
add debug, fix warnings

Conflicts:
	lib/egl/surface.cpp
	lib/egl/util.cpp
	src/core/layer_region.c
Core: Add ToString_CoreLayerRegion
sawman: fix warning
dfbtest_layers: fix max number of layers, preventing a segfault
Options: Add "fusion-shm-populate" to enable usage of MAP_POPULATE for shm buffers.
dfbtest_layer: Call Flip after SetSourceRectangle