Allow building against other qcom display HALs

* also fix normal pathing to use the new aosp paths

Change-Id: I26ca3f28f950e82130ba51b4408234d06703d044

Conflicts:
	libs/gui/Android.mk
	services/surfaceflinger/Android.mk
libEGL: allow devices to workaround Google bug 10194508

Most older blobs don't have the EGL_KHR_gl_colorspace
extension and need this workaround.

Change-Id: Ifc5d097c1a0b68275d23c2d191976ac96631b695