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847 or1200_genpc: fix ipcu_cycstb_o generation

In some circumstances the CPU is still waiting for the lsu to finish
while in a pre branch state. However, ipcu_cycstb_o is set and the cycle
starts with the wrong address on the iwb bus (the one before the
branched address).

This fixes this issue.

Patch by: Franck Jullien <franck.jullien@gmail.com>
stekern 4228d 18h /
846 or1200: Fix for cache bug related to first_{hit|miss}_ack

Under certain circumstances, when first_hit_ack and
first_miss_ack is asserted at the same time, cache data
would wrongly be overwritten with bus data.

Patch by: Matthew Hicks <firefalcon@gmail.com>
stekern 4228d 18h /
845 or1200: l.lws support

Using the l.lws instruction doesn't work currently.
It simply skips the instruction. No exception or reaction.
The patch attached simply duplicates the behaviour of
l.lwz for l.lws.

Patch by: Jeppe Græsdal Johansen <jjohan07@student.aau.dk>
stekern 4228d 18h /
844 skrzyp 4229d 11h /
843 Applied RDiez suggestions skrzyp 4229d 11h /
842 Moving GDB 7.1 into the old collection. jeremybennett 4231d 09h /
841 GDB 7.2 is now considered the stable version. jeremybennett 4231d 10h /
840 Relocate GDB 6.8 to the old directory. jeremybennett 4231d 10h /
839 Forgot about updating linker flags, thanks RDiez! skrzyp 4232d 13h /
838 added branch-delay option and sets r0 to zero skrzyp 4233d 02h /

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