add busybox gunzip/ipkg fix from #2691 (thanks, biblbroks)

SVN-Revision: 9546

package/busybox/patches/530-gunzip_src_fd.patch

@@ -0,0 +1,11 @@
+diff -Naur a/archival/libunarchive/decompress_unzip.c b/archival/libunarchive/decompress_unzip.c
+--- a/archival/libunarchive/decompress_unzip.c	2007-11-10 02:40:48.000000000 +0100
++++ b/archival/libunarchive/decompress_unzip.c	2007-11-12 02:34:43.000000000 +0100
+@@ -1178,6 +1178,7 @@
+ 	ALLOC_STATE;
+ 	bytebuffer_max = 0x8000;
+ 	bytebuffer = xmalloc(bytebuffer_max);
++	gunzip_src_fd = in;
+ 
+  again:
+ 	if (!check_header_gzip(PASS_STATE_ONLY)) {