tar: add support for PAX-encoded path=LONGFILENAME

function                                             old     new   delta
get_header_tar                                      1478    1759    +281

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/archival/libarchive/data_extract_all.c b/archival/libarchive/data_extract_all.c
index f565e54..3f67b83 100644
--- a/archival/libarchive/data_extract_all.c
+++ b/archival/libarchive/data_extract_all.c
@@ -13,13 +13,13 @@
 	int res;
 
 #if ENABLE_FEATURE_TAR_SELINUX
-	char *sctx = archive_handle->tar__next_file_sctx;
+	char *sctx = archive_handle->tar__sctx[PAX_NEXT_FILE];
 	if (!sctx)
-		sctx = archive_handle->tar__global_sctx;
+		sctx = archive_handle->tar__sctx[PAX_GLOBAL];
 	if (sctx) { /* setfscreatecon is 4 syscalls, avoid if possible */
 		setfscreatecon(sctx);
-		free(archive_handle->tar__next_file_sctx);
-		archive_handle->tar__next_file_sctx = NULL;
+		free(archive_handle->tar__sctx[PAX_NEXT_FILE]);
+		archive_handle->tar__sctx[PAX_NEXT_FILE] = NULL;
 	}
 #endif