The tests are installed to $libexecdir not $libdir/gdk-pixbuf. By default these
are the same location but they can be changed independently.
(From OE-Core rev: 56dd1a61f52cdf66fdb3e9510c70b02224475d4a)
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>