rename archive.h to bb_archive.h. no code changes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/archival/dpkg.c b/archival/dpkg.c
index 2a6a7b3..bf9e999 100644
--- a/archival/dpkg.c
+++ b/archival/dpkg.c
@@ -57,7 +57,7 @@
 
 #include "libbb.h"
 #include <fnmatch.h>
-#include "archive.h"
+#include "bb_archive.h"
 
 /* note: if you vary hash_prime sizes be aware,
  * 1) tweaking these will have a big effect on how much memory this program uses.