CryptoPkg/OpensslLib: Fix cross-build problem for AARCH64

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1089

Thanks Laszlo Ersek <lersek@redhat.com>.
Ref: https://edk2.groups.io/g/devel/message/40375

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Ting Ye <ting.ye@intel.com>
Signed-off-by: Xiaoyu Lu <xiaoyux.lu@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>

diff --git a/CryptoPkg/Library/Include/sys/syscall.h b/CryptoPkg/Library/Include/sys/syscall.h
new file mode 100644 (file)
index 0000000..ead0d7b
--- /dev/null
+++ b/CryptoPkg/Library/Include/sys/syscall.h
@@ -0,0 +1,11 @@
+/** @file\r
+  Include file to support building the third-party cryptographic library.\r
+\r
+Copyright (c) 2010 - 2017, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2019, Red Hat, Inc.\r
+SPDX-License-Identifier: BSD-2-Clause-Patent\r
+\r
+**/\r
+\r
+#include <CrtLibSupport.h>\r
+\r