ci(coverity): add coverage for TRNG service

Added build configuration for TRNG service support
on Juno platform.

Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
Change-Id: If6d4a94f7bf1e825a7dacd0272c981a3248e2161
1 file changed