Add Makefile also at toplevel.

Author: cristianoc

Makefile

@@ -0,0 +1,17 @@
+SHELL = /bin/bash
+
+build:
+	make -C analysis build
+
+clean:
+	make -C analysis clean
+
+clean-deep:
+	make -C analysis clean-deep
+
+test:
+	make -C analysis test
+
+.DEFAULT_GOAL := build
+
+.PHONY: build clean clean-deep test