expose glob method directly to Rsconscript - close #97

build_tests/library/override_arcmd.rb

@@ -1,6 +1,6 @@
 build do
   Environment.new(echo: :command) do |env|
     env["ARCMD"] = %w[ar rcf ${_TARGET} ${_SOURCES}]
-    env.Library("lib.a", Rscons.glob("*.c"))
+    env.Library("lib.a", glob("*.c"))
   end
 end