tests: Disable -Wsource-mgr for clang

Unit tests fail on clang 13.0 with a cryptic

  error: _timestamp_size changed binding to STB_WEAK [-Werror,-Wsource-mgr]

Probably something related to the weird things we do to mock memlayout
areas. Too lazy to track it down. Let's just disable this
(clang-specific, not properly documented) warning flag.

Signed-off-by: Julius Werner <jwerner@chromium.org>
Change-Id: Ie49c9eef3c74592c068c899c6717621dbcb9f609
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59814
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jakub Czapiga <jacz@semihalf.com>

0 files changed, 0 insertions, 0 deletions