message: Fix a type mismatch error in GDBRemoteCommunicationServerCommon
  GetU64 returns a uint64_t. Don't store it in size_t as that is only
  32-bit on 32-bit platforms.
diff: @@ -550,7 +550,7 @@ GDBRemoteCommunicationServerCommon::Handle_vFile_pRead(
  packet.SetFilePos(::strlen("vFile:pread:"));
  int fd = packet.GetS32(-1);
  if (packet.GetChar() == ',') {
  - size_t count = packet.GetU64(UINT64_MAX);
  + uint64_t count = packet.GetU64(UINT64_MAX);
  if (packet.GetChar() == ',') {
  off_t offset = packet.GetU64(UINT32_MAX);
  if (count == UINT64_MAX) {
  