[gdb] Fix typos

Fix typos:
- reponse -> response
- inital -> initial
- a -> an

gdb/nto-tdep.h

@@ -186,7 +186,7 @@ int nto_in_dynsym_resolve_code (CORE_ADDR pc);
 
 const char *nto_extra_thread_info (struct target_ops *self, struct thread_info *);
 
-LONGEST nto_read_auxv_from_initial_stack (CORE_ADDR inital_stack,
+LONGEST nto_read_auxv_from_initial_stack (CORE_ADDR initial_stack,
 					  gdb_byte *readbuf,
 					  LONGEST len, size_t sizeof_auxv_t);
 

gdb/testsuite/lib/gdb.exp

@@ -5916,7 +5916,7 @@ proc gdb_load_cmd { args } {
 	    return 0
 	}
 	-re "(.*)\r\n$gdb_prompt " {
-	    perror "Unexpected reponse from 'load' -- $expect_out(1,string)"
+	    perror "Unexpected response from 'load' -- $expect_out(1,string)"
 	    return -1
 	}
 	timeout {

gdb/testsuite/lib/tuiterm.exp

@@ -913,8 +913,8 @@ namespace eval Term {
 	wait_for $str
     }
 
-    # As proc command, but don't wait for a initial prompt.  This is used for
-    # inital terminal commands, where there's no prompt yet.
+    # As proc command, but don't wait for an initial prompt.  This is used for
+    # initial terminal commands, where there's no prompt yet.
     proc command_no_prompt_prefix {cmd} {
 	send_gdb "$cmd\n"
 	set str [string_to_regexp $cmd]