Port to FreeBSD aarch64

Change-Id: Ib18894db8c2943dd1502c96951545bb75a1944eb
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/91978
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

configure.ac

@@ -4424,6 +4424,11 @@ freebsd*)
     P_SEP=:
 
     case "$host_cpu" in
+    aarch64)
+        CPUNAME=AARCH64
+        PLATFORMID=freebsd_aarch64
+        RTL_ARCH=AARCH64
+        ;;
     i*86)
         CPUNAME=INTEL
         RTL_ARCH=x86

solenv/gbuild/platform/FREEBSD_AARCH64_GCC.mk

@@ -0,0 +1,14 @@
+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+#please make generic modifications to unxgcc.mk
+
+include $(GBUILDDIR)/platform/unxgcc.mk
+
+# vim: set noet sw=4: