Fixed godo bin path in makefile

Makefile

@@ -4,7 +4,7 @@ HEADERS = ../godot_headers
 TARGET = debug
 NAME = godot-cpp
 
-BASE = scons n=$(NAME) generate_bindings=yes target=$(TARGET) headers=$(HEADERS) godotbinpath=godot -j4
+BASE = scons n=$(NAME) generate_bindings=yes target=$(TARGET) headers=$(HEADERS) godotbinpath=$(GODOT_BIN_PATH) -j4
 LINUX = $(BASE) p=linux
 WINDOWS = $(BASE) p=windows
 OSX = $(BASE) p=osx