Commit 
5bd41d165 (pthread-stubs: rename to xlib_libpthread-stubs) renamed
the pthread-stubs package but forgot to update the select statements.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
        select BR2_PACKAGE_XLIB_LIBXXF86VM
        select BR2_PACKAGE_XLIB_LIBXMU
        select BR2_PACKAGE_XPROTO_DRI2PROTO
-       select BR2_PACKAGE_PTHREAD_STUBS
+       select BR2_PACKAGE_XLIB_LIBPTHREAD_STUBS
        # libatomic_ops is only available on a subset of the supported
        # architectures, and we make the assumption that the intel
        # driver can only be used on x86 and x86_64 machines.
 
 config BR2_PACKAGE_LIBXCB
        bool "libxcb"
-       select BR2_PACKAGE_PTHREAD_STUBS
+       select BR2_PACKAGE_XLIB_LIBPTHREAD_STUBS
        select BR2_PACKAGE_XCB_PROTO
        select BR2_PACKAGE_XLIB_LIBXDMCP
        select BR2_PACKAGE_XLIB_LIBXAU