Fix ARI new warnings introduced in i386-tdep.c.

Fix ARI new warnings introduced in i386-tdep.c.

1. gdb/i386-tdep.c:8720: Do not use 'long long', instead use LONGEST
gdb/i386-tdep.c:8720:  long long int size;

2. gdb/i386-tdep.c:8755: Do not use printf(%ll), instead use printf(%s,phex()) to dump a 'long long' value
gdb/i386-tdep.c:8755: ui_out_field_fmt (uiout, "size", "%lld", size);

2015-06-11  Walfred Tedeschi  <walfred.tedeschi@intel.com>

	* i386-tdep.c (i386_mpx_print_bounds): use of LONGEST instead of
	long long int and plongest instead of %ll.

Signed-off-by: Walfred Tedeschi <walfred.tedeschi@intel.com>