meson: Address warnings for switching autoconf to meson

This commit addresses the compilation warnings when switching autoconf
to meson.

Tested: Build passes with CIT and "ninja -C build".

Change-Id: Ieda04b856f4fd24de867c3eaee8b9c4a9b333aaf
Signed-off-by: Jagpal Singh Gill <paligill@gmail.com>
2 files changed