node: Add Makefile test target for arm64 (#4057)

* node: Add Makefile test target for arm64

* node: Fix comment in Makefile

node/Makefile

@@ -1,3 +1,13 @@
+.PHONY test
 test: 
+# Use this command on amd64 systems
 	go test -v -ldflags '-extldflags "-Wl,--allow-multiple-definition" ' ./...
 
+.PHONY test-arm64
+test-arm64:
+# Use this command on arm64, otherwise you will encounter linker errors.
+# It's not perfect: it will fail due to 'undefined symbols' errors
+# for packges using cgo. Still, it will get you farther than running
+# the default command.
+# To test a single package, use these -ldflags with e.g. ./pkg/governor
+	go test -ldflags '-extldflags "-Wl,-ld_classic " ' ./...