* score-tdep.c (score_frame_cache->fp, score_analyze_prologue)
(score_prologue_frame_base_address): Return fp to keep gdb print
local variables correctly when debugging information is stabs.
(score_analyze_prologue): For software watchpoint, fetch all the
instructions from range [startaddr, pc] once and identify them locally
to reduce memory access.
(score_malloc_and_get_memblock, score_free_memblock)
(score_adjust_memblock_ptr): New functions.
(score_fetch_inst): Fetch single instruction or mutiple instructions.
(score_target_can_use_watch, score_stopped_by_watch)
(score_target_insert_watchpoint, score_target_remove_watchpoint)
(score_target_insert_hw_breakpoint, score_target_remove_hw_breakpoint):
New functions for remote & local hw-watchpoint and hw-breakpoint.
