[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/disasm.h

@@ -248,7 +248,7 @@ struct gdb_non_printing_memory_disassembler
   { /* Nothing.  */ }
 };
 
-/* A dissassembler class that provides 'print_insn', a method for
+/* A disassembler class that provides 'print_insn', a method for
    disassembling a single instruction to the output stream.  */
 
 struct gdb_disassembler : public gdb_printing_disassembler,