configure: Fix the -o operator in a call to test

configure: Fix the -o operator in a call to test

The disjunction operator was misspelt as -O which tests whether the
following file is owned by the calling user. This doesn't take enough
arguments so bash was showing an error and the test was always
failing. This meant that NEED_XKB_UTILS was always false which should
have broken the build but the Makefile was mistakenly including
clutter-xkb-utils.c again if SUPPORT_WAYLAND is defined.

See 1b77565e for reference.

Reviewed-by: Emmanuele Bassi <ebassi@linux.intel.com>