Fix fail in gdb.mi/mi-reverse.exp

Commit 38b022b445 adds "method" and
"format" fields in =record-started, but doesn't update test case
gdb.mi/mi-reverse.exp, so it causes the fail like this,

PASS: gdb.mi/mi-reverse.exp: mi runto main
Expecting: ^(-interpreter-exec console record[^M
]+)?(=record-started,thread-group="i1"^M
\^done[^M
]+[(]gdb[)] ^M
[ ]*)
-interpreter-exec console record^M
=record-started,thread-group="i1",method="full"^M
^done^M
(gdb) ^M
FAIL: gdb.mi/mi-reverse.exp: Turn on process record

and regression was found by buildbot too
https://sourceware.org/ml/gdb-testers/2016-q2/msg04492.html

gdb/testsuite:

2016-07-05  Yao Qi  <yao.qi@linaro.org>

	* gdb.mi/mi-reverse.exp: Match =record-started output.

gdb/testsuite/ChangeLog

@@ -1,3 +1,7 @@
+2016-07-05  Yao Qi  <yao.qi@linaro.org>
+
+	* gdb.mi/mi-reverse.exp: Match =record-started output.
+
 2016-07-01  Pedro Alves  <palves@redhat.com>
 
 	* gdb.base/jit-reader.exp (info_registers_current_frame): New

gdb/testsuite/gdb.mi/mi-reverse.exp

@@ -51,7 +51,7 @@ mi_run_to_main
 if [supports_process_record] {
     # Activate process record/replay
     if [mi_gdb_test "-interpreter-exec console record" \
-	    "=record-started,thread-group=\"i1\"\r\n\\^done" \
+	    "=record-started,thread-group=\"i1\",method=\"full\"\r\n\\^done" \
 	    "Turn on process record"] {
 	warning "Fail to activate process record/replay, tests in this group will not be performed.\n"
 	return -1