Add a simple regression test framework.
diff --git a/libacc/test b/libacc/test
new file mode 100755
index 0000000..2f999c1
--- /dev/null
+++ b/libacc/test
@@ -0,0 +1,2 @@
+#!/bin/sh
+gcc acc.c -ldl -o tests/acc && tests/acc tests/otcc.c >tests/otcc.out && diff tests/otcc.out tests/otcc.out-orig