[S] Change in coreboot[main]: xcompile: Add option to use '-Oz' over '-Os'

[Elyes Haouas (Code Review)]

Attention is currently required from: Elyes Haouas, Felix Singer, Martin L Roth.

Hello Felix Singer, Martin L Roth, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/77189?usp=email

to look at the new patch set (#10).

The following approvals got outdated and were removed:
Verified-1 by build bot (Jenkins)

Change subject: xcompile: Add option to use '-Oz' over '-Os'
......................................................................

xcompile: Add option to use '-Oz' over '-Os'

This option will optimize aggressively for size.

Change-Id: Iffdb8c7918d768ef3e8dba24e7fb6cadabfadd8e
Signed-off-by: Elyes Haouas 
---
M Makefile.mk
M src/Kconfig
M util/xcompile/xcompile
3 files changed, 23 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/89/77189/10