Mojo EDK: Introduce MojoQueryHandleSignalsState API

mojo/public/c/system/thunks.cc

Index: mojo/public/c/system/thunks.cc
diff --git a/mojo/public/c/system/thunks.cc b/mojo/public/c/system/thunks.cc
index 1e92954a51c30b21bbde49c334aca6557896e727..877ab8fe3602746f744be61fe6b63a90ffdf2765 100644
--- a/mojo/public/c/system/thunks.cc
+++ b/mojo/public/c/system/thunks.cc
@@ -22,6 +22,13 @@ MojoResult MojoClose(MojoHandle handle) {
   return g_thunks.Close(handle);
 }
 
+MojoResult MojoQueryHandleSignalsState(
+    MojoHandle handle,
+    struct MojoHandleSignalsState* signals_state) {
+  assert(g_thunks.QueryHandleSignalsState);
+  return g_thunks.QueryHandleSignalsState(handle, signals_state);
+}
+
 MojoResult MojoWait(MojoHandle handle,
                     MojoHandleSignals signals,
                     MojoDeadline deadline,