'test' make target running all tests added

Makefile.in

@@ -169,6 +169,13 @@ CONFIG_FILES = scheme/interfaces.scm scheme/low-packages.scm \
 # default target.
 enough: $(VM) $(IMAGE) go scsh $(LIBSCSH) $(LIBSCSHVM)
 
+# Run unit tests
+test: enough
+	@echo "Running test suite..."
+	@(($(srcdir)/go -lm $(srcdir)/scsh/test/test-packages.scm    \
+         	       -o test-all -c "(test-all)" | grep -v 'OK$$') \
+	   || (echo "All tests passed"))
+
 # --------------------
 # External code to include in the VM
 # After changing any of these you should delete `scheme48vm' and remake it.