[gdb/testsuite] Fix gdb.ada/mi_prot.exp

When running test-case gdb.ada/mi_prot.exp with gcc 8.5.0, we run into:
...
(gdb) ^M
Expecting: ^(-stack-list-arguments --no-frame-filters 1[^M
]+)?(\^done,stack=.*[^M
]+[(]gdb[)] ^M
[ ]*)
-stack-list-arguments --no-frame-filters 1^M
^done,stack-args=[frame={level="0",args=[{name="<_object>",value="(ceiling_priority =\
> 97, local => 0)"},{name="v",value="5"},{name="<_objectO>",value="true"}]},frame={le\
vel="1",args=[{name="v",value="5"},{name="<_objectO>",value="true"}]},frame={level="2\
",args=[]}]^M
(gdb) ^M
FAIL: gdb.ada/mi_prot.exp: -stack-list-arguments --no-frame-filters 1 (unexpected out\
put)
...

Fix this by updating the regexp to expect "^done,stack-args=" instead of
"^done,stack=".

Tested on x86_64-linux.

1 files changed, 1 insertions, 1 deletions

diff --git a/gdb/testsuite/gdb.ada/mi_prot.exp b/gdb/testsuite/gdb.ada/mi_prot.exp
index b50c346..8936a6c 100644
--- a/gdb/testsuite/gdb.ada/mi_prot.exp
+++ b/gdb/testsuite/gdb.ada/mi_prot.exp
@@ -46,4 +46,4 @@ mi_continue_to_line $line "continue to protected method"
 
 # The bug was that this crashed.
 mi_gdb_test "-stack-list-arguments --no-frame-filters 1" \
-    "\\^done,stack=.*"
+    "\\^done,stack-args=.*"