[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/amd-dbgapi-target.c

@@ -1515,7 +1515,7 @@ amd_dbgapi_target::store_registers (struct regcache *regcache, int regno)
   amdgpu_gdbarch_tdep *tdep = get_amdgpu_gdbarch_tdep (gdbarch);
 
   /* If the register has read-only bits, invalidate the value in the regcache
-     as the value actualy written may differ.  */
+     as the value actually written may differ.  */
   if (tdep->register_properties[regno]
       & AMD_DBGAPI_REGISTER_PROPERTY_READONLY_BITS)
     regcache->invalidate (regno);