The name is wrong, so this only really worked if xcb was
actually linked normally, if the user opened it in another
way (dlopen) this would get missed.

Bug: b/139491466

Change-Id: Ib9a84bd7424a1c4bf027ecb9f1a5b9af6d7210b3
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/38368Reviewed-by: Ben Clayton <bclayton@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Andrew Woloszyn <awoloszyn@google.com>