Fix crossscripts to report the correct "serverbin" value.
While the packaged "cups-config --serverbin" reported
"/usr/libexec/cups" the crossscripts version reported
"/usr/lib/cups", causing packaging issues when building for example
cups-filters.
Also fix FILES_${PN} to use ${libexecdir}; previously it was working
just because "${libexecdir}/*" was part of the default values in
bitbake.conf.
Signed-off-by: Diego Rondini <diego.rondini@kynetics.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
