ci: Move kata-arch.sh as it was

Let's move `.ci/kata-arch.sh` file from the tests repo to this one.

The file has been moved as it is, it's not used, and in the following
commits we'll clean it up before actually using it.

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

tests/kata-arch.sh

@@ -0,0 +1,128 @@
+#!/usr/bin/env bash
+#
+# Copyright (c) 2018 Intel Corporation
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+set -e
+
+typeset -r script_name=${0##*/}
+
+typeset -r cidir=$(dirname "$0")
+source "${cidir}/lib.sh"
+
+usage()
+{
+cat <<EOF
+Description: Display host architecture name in various formats.
+
+Usage: $script_name [options]
+
+Options:
+
+ -d, --default         : Show arch(1) architecture (this is the default).
+ -g, --golang          : Show architecture name using golang naming.
+ -r, --rust            : Show architecture name using rust naming
+ -h, --help            : Show this help.
+ -k, --kernel          : Show architecture name compatible with Linux* build system.
+
+EOF
+}
+
+# Convert architecture to the name used by golang
+arch_to_golang()
+{
+	local -r arch="$1"
+
+	case "$arch" in
+		aarch64) echo "arm64";;
+		ppc64le) echo "$arch";;
+		x86_64) echo "amd64";;
+		s390x) echo "s390x";;
+		*) die "unsupported architecture: $arch";;
+	esac
+}
+
+# Convert architecture to the name used by rust
+arch_to_rust()
+{
+	local arch="$1"
+
+	if [ "${arch}" == "ppc64le" ]; then
+		arch="powerpc64le"
+		ARCH="${arch}"
+	fi
+
+	[ "${CROSS_BUILD}" == "false" ] && echo "${arch}" || echo "${ARCH}"
+}
+
+# Convert architecture to the name used by the Linux kernel build system
+arch_to_kernel()
+{
+	local -r arch="$1"
+
+	case "$arch" in
+		aarch64) echo "arm64";;
+		ppc64le) echo "powerpc";;
+		x86_64) echo "$arch";;
+		s390x) echo "s390x";;
+		*) die "unsupported architecture: $arch";;
+	esac
+}
+
+main()
+{
+	local type="default"
+
+	local getopt_cmd="getopt"
+
+	# macOS default getopt does not recognize GNU options
+	[ "$(uname -s)" == "Darwin" ] && getopt_cmd="/usr/local/opt/gnu-getopt/bin/${getopt_cmd}"
+
+	local args=$("$getopt_cmd" \
+		-n "$script_name" \
+		-a \
+		--options="dgrhk" \
+		--longoptions="default golang  rust help kernel" \
+		-- "$@")
+
+	eval set -- "$args"
+	[ $? -ne 0 ] && { usage >&2; exit 1; }
+
+	while [ $# -gt 1 ]
+	do
+		case "$1" in
+			-d|--default) ;;
+
+			-g|--golang) type="golang";;
+
+			-r|--rust) type="rust";;
+
+			-h|--help)
+				usage
+				exit 0
+				;;
+
+			-k|--kernel) type="kernel";;
+
+			--)
+				shift
+				break
+				;;
+		esac
+		shift
+	done
+
+	local -r arch=$(uname -m)
+
+	case "$type" in
+		default) echo "$arch";;
+		golang) arch_to_golang "$arch";;
+		rust) arch_to_rust "${arch}";;
+		kernel) arch_to_kernel "$arch";;
+	esac
+}
+
+main "$@"
+