[GDBServer][AArch64] Enable support for tracepoints

gdb/gdbserver/ChangeLog:

	* linux-aarch64-low.c (aarch64_supports_tracepoints): New
	function.  Return 1.
	(the_low_target): Install it.

gdb/ChangeLog

@@ -1,3 +1,9 @@
+2015-07-09  Pierre Langlois  <pierre.langlois@arm.com>
+
+	* linux-aarch64-low.c (aarch64_supports_tracepoints): New
+	function.  Return 1.
+	(the_low_target): Install it.
+
 2015-07-09  Pierre Langlois  <pierre.langlois@arm.com>
 
 	* gdb.trace/backtrace.exp: Set registers for aarch64 target.

gdb/gdbserver/linux-aarch64-low.c

@@ -1276,6 +1276,14 @@ aarch64_regs_info (void)
   return &regs_info;
 }
 
+/* Implementation of linux_target_ops method "supports_tracepoints".  */
+
+static int
+aarch64_supports_tracepoints (void)
+{
+  return 1;
+}
+
 struct linux_target_ops the_low_target =
 {
   aarch64_arch_setup,
@@ -1302,6 +1310,8 @@ struct linux_target_ops the_low_target =
   aarch64_linux_new_thread,
   aarch64_linux_new_fork,
   aarch64_linux_prepare_to_resume,
+  NULL,
+  aarch64_supports_tracepoints,
 };
 
 void