Makefile: Don't rebuild when generating tags or file list

Generating a project file list used to do a rebuild of the project.
Instead, just make sure there's a coreboot.rom file present and if
it is, generate the list.

Change-Id: I9cc12ef3d1990c3422625630451b2a7b8d77829c
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/21585
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

0 files changed, 0 insertions, 0 deletions