SIS Update to rtems-tools and RSB

[Joel Sherrill]

Hi

A patch with Jiri's patch set is waiting list moderator approval.
With that committed, my RSB patches (1) update the newlib
used to the current snapshot and (2) switch sparc gdb to
gdb 7.9 and add Jiri's patch set.

Jiri's patch set enables basic leon2 and leon3 executables
to run with the simulator in gdb. It also eliminates the
need for the sis BSP variant of the erc32. The simulator
now initializes in the same state as the hardware.

Once this is merged, we have to decide when to eliminate
the sis BSP (sniff.. for a long time friend). This is a harder
BSP variant to eliminate than normal because it is our
"goto" BSP and referenced in a LOT of places.

--joel