Patch merged into coreboot/master: Memtest86Plus/Makefile: Update to common payload makefile format

the following patch was just integrated into master:
commit 4793ec3ea18b099efab7d8acf97e0063e0f577b7
Author: Martin Roth 
Date:   Wed Mar 16 15:00:37 2016 -0600

Memtest86Plus/Makefile: Update to common payload makefile format

This series of patches attempts to update all of the external payload
    makefiles to be as similar as possible.

- Add .git to the git repo URL to show that it's a git repo.
    - Use the common checkout, fetch, and clone ($(project dir)) targets
    - Add TAG-y and NAME-y variables - just with origin/master for now.
    Stable will be added shortly.
    - Make sure all phony targets are in .PHONY

Change-Id: If83c100841d5f91a9fab7ac44ba20ec2271c0594
    Signed-off-by: Martin Roth 
    Reviewed-on: https://review.coreboot.org/14152
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See https://review.coreboot.org/14152 for details.

-gerrit