change executable name

wscript

@@ -34,7 +34,7 @@ def build(bld):
         libs += ["dl", "GL"]
     bld.program(
             source = sources,
-            target = "app",
+            target = "freetype2gl3",
             uselib = ["SDL2", "FreeType2"],
             lib = libs,
             linkflags = ["-Wl,-rpath,$ORIGIN"],