digitemp: fix QA issues:

* missing SRC_URI checksums
* GNU_HASH QA errors:
	WARNING: QA Issue: No GNU_HASH in the elf binary: '/OE/tentacle/build/tmp-angstrom_2010_x-eglibc/work/armv7a-angstrom-linux-gnueabi/digitemp-3.6.0-r2/packages-split/digitemp/usr/sbin/digitemp_DS9097U'
	WARNING: QA Issue: No GNU_HASH in the elf binary: '/OE/tentacle/build/tmp-angstrom_2010_x-eglibc/work/armv7a-angstrom-linux-gnueabi/digitemp-3.6.0-r2/packages-split/digitemp/usr/sbin/digitemp_DS9097'
* $(uname -s) access

Acked-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>