Add build_static

Author: nodech

Makefile

@@ -8,7 +8,7 @@ VERSION_TAG=0.2.0
 all: install test
 
 install: get_vendor_deps
-	@go install --ldflags '-extldflags "-static"' \
+	@go install \
 		--ldflags "-X github.com/tendermint/ethermint/version.GitCommit=`git rev-parse HEAD`" \
 		./cmd/ethermint
 
@@ -17,6 +17,11 @@ build:
 		--ldflags "-X github.com/tendermint/ethermint/version.GitCommit=`git rev-parse HEAD`" \
 		-o ./build/ethermint ./cmd/ethermint
 
+build_static:
+	@go build \
+		--ldflags "-extldflags '-static' -X github.com/tendermint/ethermint/version.GitCommit=`git rev-parse HEAD`" \
+		-o ./build/ethermint ./cmd/ethermint
+
 build_race:
 	@go build -race -o build/ethermint ./cmd/ethermint