gdb: rename "maint agent" functions

Functions agent_eval_command and agent_command are used to implement
maintenance commands, rename them accordingly (with the maint_ prefix),
as well as the agent_command_1 helper function.

Change-Id: Iacf96d4a0a26298e8dd4648a0f38da649ea5ef61
diff --git a/gdb/ax-gdb.c b/gdb/ax-gdb.c
index 67d4db3..088f77f7 100644
--- a/gdb/ax-gdb.c
+++ b/gdb/ax-gdb.c
@@ -2491,7 +2491,7 @@ agent_eval_command_one (const char *exp, int eval, CORE_ADDR pc)
 }
 
 static void
-agent_command_1 (const char *exp, int eval)
+maint_agent_command_1 (const char *exp, int eval)
 {
   /* We don't deal with overlay debugging at the moment.  We need to
      think more carefully about this.  If you copy this code into
@@ -2529,9 +2529,9 @@ agent_command_1 (const char *exp, int eval)
 }
 
 static void
-agent_command (const char *exp, int from_tty)
+maint_agent_command (const char *exp, int from_tty)
 {
-  agent_command_1 (exp, 0);
+  maint_agent_command_1 (exp, 0);
 }
 
 /* Parse the given expression, compile it into an agent expression
@@ -2539,9 +2539,9 @@ agent_command (const char *exp, int from_tty)
    expression.  */
 
 static void
-agent_eval_command (const char *exp, int from_tty)
+maint_agent_eval_command (const char *exp, int from_tty)
 {
-  agent_command_1 (exp, 1);
+  maint_agent_command_1 (exp, 1);
 }
 
 /* Parse the given expression, compile it into an agent expression
@@ -2620,7 +2620,7 @@ void _initialize_ax_gdb ();
 void
 _initialize_ax_gdb ()
 {
-  add_cmd ("agent", class_maintenance, agent_command,
+  add_cmd ("agent", class_maintenance, maint_agent_command,
 	   _("\
 Translate an expression into remote agent bytecode for tracing.\n\
 Usage: maint agent [-at LOCATION,] EXPRESSION\n\
@@ -2628,7 +2628,7 @@ If -at is given, generate remote agent bytecode for this location.\n\
 If not, generate remote agent bytecode for current frame pc address."),
 	   &maintenancelist);
 
-  add_cmd ("agent-eval", class_maintenance, agent_eval_command,
+  add_cmd ("agent-eval", class_maintenance, maint_agent_eval_command,
 	   _("\
 Translate an expression into remote agent bytecode for evaluation.\n\
 Usage: maint agent-eval [-at LOCATION,] EXPRESSION\n\