Fix warnings reported by Coverity Scan.
Resource leak (RESOURCE_LEAK)
leaked_storage: Variable info going out of scope leaks the storage it
points to.
Fixes: 9bc5b2d169 ("vulkan: add initial device selection layer. (v6.1)")
Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6509>