tree cbc94a38b91631b077fb21e0ab490c12da1dd4fe
parent c2a770925da019a82e23aacacf12be3bfe691766
author Courtney Goeltzenleuchter <courtneygo@google.com> 1455288792 -0700
committer Courtney Goeltzenleuchter <courtneygo@google.com> 1455302382 -0700

loader: Add extension before CreateInstance chain

A developer can cause the loader to enable VK_EXT_debug_report
extension by setting a specific property. However, that check
was happening after the instance chain was called and thus
no layers saw the extension enabled.
Also fix use of AddExtensionToCreateInfo to always allocate
and insert VK_EXT_debug_report. Otherwise cannot distinguish
between the failure case and the extension is already present
case.

Change-Id: Id64bb14cb2086e94190625b4364329d634afda70