Change in coreboot[master]: payloads/tianocore: Rework Makefile

[Sean Rhodes (Code Review)]

Attention is currently required from: Martin Roth, Matt DeVillier, Stefan Reinauer.
Hello build bot (Jenkins), Martin Roth, Matt DeVillier, Stefan Reinauer,

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

https://review.coreboot.org/c/coreboot/+/61620

to look at the new patch set (#13).

Change subject: payloads/tianocore: Rework Makefile
......................................................................

payloads/tianocore: Rework Makefile

Rework edkii makefile so that the various build options are
unified between CorebootPayloadPkg, uefipayload_202107 and
upstream. This includes 3 new options:
* TIANOCORE_BOOT_MANAGER_ESCAPE
* TIANOCORE_HAVE_EFI_SHELL
* TIANOCORE_FOLLOW_BGRT_SPEC

This sets the project directory based on the git repository name
i.e. https://github.com/mrchromebox/edk2 becomes mrchomebox

Also builds to $(obj)/UEFIPAYLOAD.fd.

Signed-off-by: Sean Rhodes 
Change-Id: I3cc274e7385dd71c2aae315162cc48444b7eaa5f
---
M payloads/external/Makefile.inc
M payloads/external/tianocore/Kconfig
M payloads/external/tianocore/Makefile
3 files changed, 152 insertions(+), 90 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/20/61620/13