RFA: support in src-release to create a release-style sim.tar.bz2

[Tom Tromey]

>>>>> "H-P" == Hans-Peter Nilsson <hp@bitrange.com> writes:

H-P> Ok to commit?

H-P> toplevel:
H-P> 	* src-release (do-proto-toplevel): Support subdir-path-prefixed
H-P> 	files in SUPPORT_FILES.
H-P> 	(SIM_SUPPORT_DIRS): New variable.
H-P> 	(sim.tar.bz2): New rule.

This is ok.  Thanks.

Tom