xcompile: Add separation for architectures to improve readability

- Add bar at the top of each architecture
- Make the architecture name and the TARCH_SEARCH to two lines
- Add a second line at the bottom of each architecture
- Add a comment about the two blank lines so they don't get
accidentally removed.

Change-Id: Ib4326bd94fe39b979244816ce54b752d083f6b16
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/12838
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
1 file changed