gdb: Remove file path from test name

Having paths in test names makes comparing sum files difficult, rename
a test to avoid paths in test names.

gdb/testsuite/ChangeLog:

	* gdb.base/style-logging.exp: Remove path from test name.

diff --git a/gdb/testsuite/gdb.base/style-logging.exp b/gdb/testsuite/gdb.base/style-logging.exp
--- a/gdb/testsuite/gdb.base/style-logging.exp
+++ b/gdb/testsuite/gdb.base/style-logging.exp
@@ -38,7 +38,8 @@ save_vars { env(TERM) } {
     gdb_test_no_output "set style enabled on"
 
     set log_name [standard_output_file log.txt]
-    gdb_test_no_output "set logging file $log_name"
+    gdb_test_no_output "set logging file $log_name" \
+	"set logging filename"
     gdb_test_no_output "set logging overwrite on"
     gdb_test "set logging on" "Copying output to .*"