[PATCH] Restore original GDB prompt in define.exp

[Richard Bunt <Richard.Bunt@arm.com>]

define.exp will fail on a GDB which has set a custom prompt to identify
itself.  This is because the test resets the prompt to a hard coded
"(gdb)" but then verifies the success of this against the value in
$gdb_prompt, which is set to the custom prompt.

define.exp has been modified to reset the prompt to $gdb_prompt rather
than a hard coded "(gdb)".

Regression tested with GCC 7.3.0 on x86_64, ppc64le, aarch64.

gdb/testsuite/ChangeLog:

2019-06-08  Richard Bunt  <richard.bunt@arm.com>
	Stephen Roberts  <stephen.roberts@arm.com>

	* gdb.base/define.exp: Restore original prompt.

Change-Id: Ie1b883be7cd77f2208ef9db6eadde1fd0d6a4e53
---
 gdb/testsuite/gdb.base/define.exp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdb/testsuite/gdb.base/define.exp b/gdb/testsuite/gdb.base/define.exp
index 0590da9..7bd4b7e 100644
--- a/gdb/testsuite/gdb.base/define.exp
+++ b/gdb/testsuite/gdb.base/define.exp
@@ -292,7 +292,7 @@ gdb_test_multiple "set prompt \\(blah\\) " "set gdb_prompt" {
     }
 }
 
-gdb_test_multiple "set prompt \\(gdb\\) " "reset gdb_prompt" {
+gdb_test_multiple "set prompt $gdb_prompt " "reset gdb_prompt" {
     -re "$gdb_prompt $" {
 	pass "reset gdb_prompt"
     }
-- 
2.7.4