scripts/qemu-gdb: add simple tcg lock status helper

Add a simple helper to dump lock state.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/scripts/qemu-gdb.py b/scripts/qemu-gdb.py
index b3f8e04..d58213e 100644
--- a/scripts/qemu-gdb.py
+++ b/scripts/qemu-gdb.py
@@ -26,7 +26,7 @@
 
 sys.path.append(os.path.dirname(__file__))
 
-from qemugdb import aio, mtree, coroutine
+from qemugdb import aio, mtree, coroutine, tcg
 
 class QemuCommand(gdb.Command):
     '''Prefix for QEMU debug support commands'''
@@ -38,6 +38,7 @@
 coroutine.CoroutineCommand()
 mtree.MtreeCommand()
 aio.HandlersCommand()
+tcg.TCGLockStatusCommand()
 
 coroutine.CoroutineSPFunction()
 coroutine.CoroutinePCFunction()