devtools: fix return of forbidden addition checks
devtools: fix return of forbidden addition checks

Explicitly collect the error code of the multiple awk script calls.

Bugzilla ID: 165
Fixes: 4d4c612e6a30 ("devtools: check wrong svg include in guides")
Cc: stable@dpdk.org

Signed-off-by: Arnon Warshavsky <27f27ea995765a3349742edc5a8a15d791390646@qwilt.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk