Update toolchain-funcs.eclass to lastest gentoo

BUG=b/425627696
TEST=presubmit
RELEASE_NOTE=None

Change-Id: I80548e5a4becac2631c063a8b2102a3bb83f693b
Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/chromiumos-overlay/+/105597
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Chenglong Tang <chenglongtang@google.com>
1 file changed