Workaround gcc11 bug that occurs when building AckHandlersTest

Summary:
This fixes a compiler bug that is hit when building AckHandlersTest.cpp using gcc11.

This was reported in #331 and started happening consistently when the Github CI build was updated to use Ubuntu 22.04.

Reviewed By: chadaustin, sharmafb

Differential Revision: D57506683

fbshipit-source-id: a156a9ba7641f395ea9da01ec084fdccb3d6a88b

quic/state/test/AckHandlersTest.cpp

@@ -1090,8 +1090,8 @@ TEST_P(AckHandlersTest, TestAckMultipleSequentialBlocksLoss) {
       conn.outstandings.packets.begin(),
       conn.outstandings.packets.end(),
       [](auto& op) {
-        return op.packet.header.getPacketSequenceNum() == 15 ||
-            op.packet.header.getPacketSequenceNum() == 16;
+        auto seqno = op.packet.header.getPacketSequenceNum();
+        return seqno == 15 || seqno == 16;
       });
   EXPECT_TRUE(itr != conn.outstandings.packets.end());
   EXPECT_TRUE(itr->declaredLost);
@@ -1114,8 +1114,8 @@ TEST_P(AckHandlersTest, TestAckMultipleSequentialBlocksLoss) {
       conn.outstandings.packets.begin(),
       conn.outstandings.packets.end(),
       [](auto& op) {
-        return op.packet.header.getPacketSequenceNum() == 15 ||
-            op.packet.header.getPacketSequenceNum() == 16;
+        auto seqno = op.packet.header.getPacketSequenceNum();
+        return seqno == 15 || seqno == 16;
       });
   EXPECT_TRUE(itr == conn.outstandings.packets.end());