[gdb] Fix more typos

Fix some more typos:
- distinquish -> distinguish
- actualy -> actually
- singe -> single
- frash -> frame
- chid -> child
- dissassembler -> disassembler
- uninitalized -> uninitialized
- precontidion -> precondition
- regsiters -> registers
- marge -> merge
- sate -> state
- garanteed -> guaranteed
- explictly -> explicitly
- prefices (nonstandard plural) -> prefixes
- bondary -> boundary
- formated -> formatted
- ithe -> the
- arrav -> array
- coresponding -> corresponding
- owend -> owned
- fials -> fails
- diasm -> disasm
- ture -> true
- tpye -> type

There's one code change, the name of macro SIG_CODE_BONDARY_FAULT changed to
SIG_CODE_BOUNDARY_FAULT.

Tested on x86_64-linux.

gdb/breakpoint.c

@@ -2459,7 +2459,7 @@ build_target_condition_list (struct bp_location *bl)
   /* No NULL conditions or failed bytecode generation.  Build a
      condition list for this location's address.  If we have software
      and hardware locations at the same address, they aren't
-     considered duplicates, but we still marge all the conditions
+     considered duplicates, but we still merge all the conditions
      anyway, as it's simpler, and doesn't really make a practical
      difference.  */
   for (bp_location *loc : loc_range)