hplip: use libexecdir
hplip: use libexecdir

In oe-core commit:
2ce6ef29b9bb4f16ed9d78e166d455b7a6d968bf
cups crossscripts have been fixed to report the correct serverbin folder, so
backend, filters, etc, need to go in ${libexecdir} now.

Signed-off-by: Diego Rondini <f48a046fa74db96735a4084e98d9bb18d62ce377@kynetics.com>
Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>

openembedded/meta-openembedded,schnitzeltony/meta-openembedded,schnitzeltony/meta-openembedded,schnitzeltony/meta-openembedded,VCTLabs/meta-openembedded,moto-timo/meta-openembedded,VCTLabs/meta-openembedded,VCTLabs/meta-openembedded,rehsack/meta-openembedded,VCTLabs/meta-openembedded,VCTLabs/meta-openembedded,schnitzeltony/meta-openembedded,schnitzeltony/meta-openembedded,openembedded/meta-openembedded,rehsack/meta-openembedded,schnitzeltony/meta-openembedded,rehsack/meta-openembedded,openembedded/meta-openembedded,VCTLabs/meta-openembedded,openembedded/meta-openembedded,openembedded/meta-openembedded,moto-timo/meta-openembedded,moto-timo/meta-openembedded,rehsack/meta-openembedded,openembedded/meta-openembedded,moto-timo/meta-openembedded,openembedded/meta-openembedded,moto-timo/meta-openembedded,schnitzeltony/meta-openembedded,VCTLabs/meta-openembedded,rehsack/meta-openembedded,VCTLabs/meta-openembedded,openembedded/meta-openembedded,rehsack/meta-openembedded,rehsack/meta-openembedded