cpukit i386: Address unused parameter warnings

Add "(void) param;" annotation to address unused parameter warnings.
Found with GCC's warning -Wunused-parameter.

cpukit/libdebugger/rtems-debugger-i386.c

@@ -506,6 +506,11 @@ rtems_debugger_target_hwbreak_control(rtems_debugger_target_watchpoint wp,
                                       uintptr_t                        addr,
                                       DB_UINT                          kind)
 {
+  (void) wp;
+  (void) insert;
+  (void) addr;
+  (void) kind;
+
   /*
    * To do.
    */
@@ -515,6 +520,8 @@ rtems_debugger_target_hwbreak_control(rtems_debugger_target_watchpoint wp,
 int
 rtems_debugger_target_cache_sync(rtems_debugger_target_swbreak* swbreak)
 {
+  (void) swbreak;
+
   /*
    * Nothing to do on an i386.
    */

cpukit/libdl/rtl-mdreloc-i386.c

@@ -23,6 +23,9 @@ uint32_t
 rtems_rtl_elf_section_flags (const rtems_rtl_obj* obj,
                              const Elf_Shdr*      shdr)
 {
+  (void) obj;
+  (void) shdr;
+
   return 0;
 }
 
@@ -61,6 +64,8 @@ rtems_rtl_elf_arch_section_free (const rtems_rtl_obj* obj,
 bool
 rtems_rtl_elf_rel_resolve_sym (Elf_Word type)
 {
+  (void) type;
+
   return true;
 }
 
@@ -140,6 +145,9 @@ rtems_rtl_elf_relocate_rel (rtems_rtl_obj*            obj,
                             const Elf_Byte            syminfo,
                             const Elf_Word            symvalue)
 {
+  (void) symname;
+  (void) syminfo;
+
   Elf_Addr  target = 0;
   Elf_Addr* where;
   Elf_Addr  tmp;