Merge pull request #13 from huachaohuang/patch-1

Allow to compile in nested packages.
diff --git a/configure.ac b/configure.ac
index 3660a5c..2b573a1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -9,6 +9,7 @@
 
 AC_INIT([snappy], [snappy_major.snappy_minor.snappy_patchlevel])
 AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_AUX_DIR([.])
 
 # These are flags passed to automake (though they look like gcc flags!)
 AM_INIT_AUTOMAKE([-Wall])