goldfish-opengl: expose VK_KHR_create_renderpass2 + VK_KHR_imageless_framebuffer

Expose on Linux only for now.  RenderPass2 might need emulation
of some formats to work everywhere (b:228922326), and it doesn't
seem imageless_framebuffer is used by ANGLE yet.  They should work
though, plus or minus host versioning issues.

BUG=240145689
BUG=239872285
TET=compile

Change-Id: I7b8788b488856b548ac025db3e750002e3d0f01b
1 file changed