fix(c/libuv): Add missing essential funcs for uv_loop_t & uv_req_t

Signed-off-by: hackerchai <i@hackerchai.com>

c/libuv/libuv.go

@@ -213,6 +213,16 @@ func LoopNew() *Loop {
 	return nil
 }
 
+// llgo:link (*Loop).SetData C.uv_loop_set_data
+func (loop *Loop) SetData(data c.Pointer) {
+	return
+}
+
+// llgo:link (*Loop).GetData C.uv_loop_get_data
+func (loop *Loop) GetData() c.Pointer {
+	return nil
+}
+
 // llgo:link (*Loop).Now C.uv_now
 func (loop *Loop) Now() c.UlongLong {
 	return 0

c/libuv/net.go

@@ -265,6 +265,11 @@ func (req *Req) GetType() ReqType {
 	return 0
 }
 
+// llgo:link (*Req).Cancel C.uv_cancel
+func (req *Req) Cancel() c.Int {
+	return 0
+}
+
 // ----------------------------------------------
 
 /* Stream related function and method */