Remove comma from Makefile phony (#78)

Author: Eric-Warehime

Makefile

@@ -15,7 +15,7 @@ export GO111MODULE = on
 # Default target executed when no arguments are given to make.
 default_target: all
 
-.PHONY: build, default_target
+.PHONY: build default_target
 
 ###############################################################################
 ###                          evmd Build & Install                           ###
@@ -288,4 +288,4 @@ contracts-compile:
 # Add a new solidity contract to be compiled
 contracts-add:
 	@echo "Adding a new smart contract to be compiled..."
-	@python3 ./scripts/compile_smart_contracts/compile_smart_contracts.py --add $(CONTRACT)
+	@python3 ./scripts/compile_smart_contracts/compile_smart_contracts.py --add $(CONTRACT)