run-gdb: make dry run dry

run-gdb

@@ -196,12 +196,13 @@ See: https://github.com/cirosantilli/linux-kernel-module-cheat#gdb-builtin-cpu-s
         cmd.extend(after)
         if self.env['test']:
             self.sh.print_cmd(cmd)
-            GdbTestcase(
-                self.env['source_path'],
-                test_script_path,
-                self.sh.strip_newlines(cmd),
-                verbose=self.env['verbose'],
-            )
+            if not self.env['dry_run']:
+                GdbTestcase(
+                    self.env['source_path'],
+                    test_script_path,
+                    self.sh.strip_newlines(cmd),
+                    verbose=self.env['verbose'],
+                )
         else:
             # I would rather have cwd be out_rootfs_overlay_dir,
             # but then lx-symbols cannot fine the vmlinux and fails with: