Change in coreboot[master]: libpayload/defconfig: enable vboot Lib Build

[Jakub Czapiga (Code Review)]

Attention is currently required from: Bora Guvendik, Anil Kumar K, Selma Bensaid, Tim Wawrzynczak, Julius Werner, Balaji Manigandan.
Jakub Czapiga has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63240 )

Change subject: libpayload/defconfig: enable vboot Lib Build
......................................................................

Patch Set 3: Code-Review+1

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/63240/comment/134a9c09_3cce3134 
PS3, Line 9: #3461454
> or let CONFIG_LP_DEFCONFIG_OVERRIDE=y pick config.chromeos instead of default defconfig.

After looking at how external payloads are build in coreboot I came to conclusion, that enabling LIB_VBOOT in defconfig might not be as bad as I thought. My view was limited to ChromeOS SDK only, but if depthcharge is present here as linked payload, then it should build anyway (we should aim for it).

+Julius What do you think about it?