kata-deploy: Fix static shim-v2 build on arm64

Following Jong Wu suggestion, let's link /usr/bin/musl-gcc to
/usr/bin/aarch64-linux-musl-gcc.

Fixes: #6320
Signed-off-by: SinghWang <wangxin_0611@126.com>
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
(cherry picked from commit b4a1527aa6)
Signed-off-by: Greg Kurz <groug@kaod.org>

tools/packaging/static-build/shim-v2/install_go_rust.sh

@@ -58,6 +58,10 @@ case "${ARCH}" in
 	aarch64)
 		goarch=arm64
 		LIBC=musl
+		# This is a hack needed as part of Ubuntu 20.04
+		if [ ! -f /usr/bin/aarch64-linux-musl-gcc ]; then
+			ln -sf /usr/bin/musl-gcc /usr/bin/aarch64-linux-musl-gcc
+		fi
 		;;
 	ppc64le) 
 		goarch=${ARCH}