Merge pull request #17 from flipt-io/edit-makefile

chore: get Makefile working for all different libs

Makefile

@@ -1,15 +1,15 @@
 LIB = libfliptengine
+HEADER = flipt_engine.h
 
 .DEFAULT_GOAL := help
-.PHONY: go node python ruby help clean
+.PHONY: build go node python ruby help clean
 
 # run cargo build if anything in engine/ changes
 build: ## Build the shared engine library
 	cargo build --release
 
 go: build ## Prepare the go client for building
-	cp target/release/$(LIB).* flipt-client-go/
-	cp target/release/flipt_engine.h flipt-client-go/
+	cp target/release/$(LIB).* target/release/$(HEADER) flipt-client-go/
 
 node: build ## Prepare the node client for building
 	cp target/release/$(LIB).* flipt-client-node/
@@ -22,7 +22,7 @@ ruby: build ## Prepare the ruby client for building
 
 clean: ## Clean up build artifacts
 	rm -rf target
-	rm -rf flipt-client-go/$(LIB).*
+	rm -rf flipt-client-go/$(LIB).* flipt-client-go/$(HEADER)
 	rm -rf flipt-client-node/$(LIB).*
 	rm -rf flipt-client-python/$(LIB).*
 	rm -rf flipt-client-ruby/lib/ext/$(LIB).*