cpu: Introduce CPUClass::gdb_core_xml_file for GDB_CORE_XML

Replace the GDB_CORE_XML define in gdbstub.c with a CPUClass field.
Use first_cpu for qSupported and qXfer:features:read: for now.
Add a stub for xml_builtin.

Signed-off-by: Andreas Färber <afaerber@suse.de>

1 files changed, 5 insertions, 0 deletions

diff --git a/stubs/gdbstub.c b/stubs/gdbstub.c
new file mode 100644
index 0000000000..c1dbfe7fb7
--- /dev/null
+++ b/stubs/gdbstub.c
@@ -0,0 +1,5 @@
+#include "qemu-common.h"
+
+const char *const xml_builtin[][2] = {
+  { NULL, NULL }
+};