Issue #124 JTAG test intermittently fails with incorrect value
Issue #124 JTAG test intermittently fails with incorrect value

Avoid a race condition where ifd_instruction_valid and ifd_instruction
changed in different cycles when dbg_halt was inserted. This would
cause the uninitialized dbg_instruction_inject to take the place of
a valid instruction fetched a cycle prior.

jbush001/NyuziProcessor,jbush001/NyuziProcessor,jbush001/NyuziProcessor,jbush001/NyuziProcessor,jbush001/NyuziProcessor,jbush001/NyuziProcessor