Added codesign to the wapm/wasmer binaries

Author: syrusakbary

Makefile

@@ -303,6 +303,9 @@ else
 	if [ -d "wapm-cli" ]; then \
 		cp wapm-cli/target/release/wapm package/bin/ ;\
 	fi
+ifeq ($(UNAME_S), Darwin)
+	codesign -s - package/bin/wapm
+endif
 endif
 
 package-wasmer:
@@ -311,6 +314,9 @@ ifeq ($(OS), Windows_NT)
 	cp target/release/wasmer.exe package/bin/
 else
 	cp target/release/wasmer package/bin/
+ifeq ($(UNAME_S), Darwin)
+	codesign -s - package/bin/wasmer
+endif
 endif
 
 package-capi: