[msan] Fix msan_test broken after r299884.

[vitalybuka]

Summary

Bind to ANY as some machines may have IPv6 support but without IPv6 on loopback
interface.

[eugenis]

LGTM

[hfinkel]

LGTM, let's try it. It would be good to commit the vector fix separately in case we need to revert the interface change we shouldn't lose the bug fix too.

[vitalybuka]

Move vector fix into separate patch.

[vitalybuka]

In D31998#725569, @hfinkel wrote:

LGTM, let's try it. It would be good to commit the vector fix separately in case we need to revert the interface change we shouldn't lose the bug fix too.

Done

lib/msan/tests/msan_test.cc

 
 class SocketAddr4 : public SocketAddr {
  public:
   SocketAddr4() { EXPECT_POISONED(sai_); }
   explicit SocketAddr4(uint16_t port) {
     memset(&sai_, 0, sizeof(sai_));
     sai_.sin_family = AF_INET;
     sai_.sin_port = port;
-    sai_.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+    sai_.sin_addr.s_addr = htonl(INADDR_ANY);
   }
 
   sockaddr *ptr() override { return reinterpret_cast<sockaddr *>(&sai_); }
 
   size_t size() const override { return sizeof(sai_); }
 
  private:
   sockaddr_in sai_;
 };
 
 class SocketAddr6 : public SocketAddr {
  public:
   SocketAddr6() { EXPECT_POISONED(sai_); }
   explicit SocketAddr6(uint16_t port) {
     memset(&sai_, 0, sizeof(sai_));
     sai_.sin6_family = AF_INET6;
     sai_.sin6_port = port;
-    sai_.sin6_addr = in6addr_loopback;
+    sai_.sin6_addr = in6addr_any;
   }
 
   sockaddr *ptr() override { return reinterpret_cast<sockaddr *>(&sai_); }
 
   size_t size() const override { return sizeof(sai_); }
 
  private:
   sockaddr_in6 sai_;