cbfstool: provide a prototype for remove_file_from_cbfs

To complement commit e1bb49e (Add a "remove" command to cbfstool) and
fix a compiler warning provide a prototype for remove_file_from_cbfs.

Change-Id: Ied8eac956de5fed3f9d82ce1e911ee1fec52db15
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Reviewed-on: http://review.coreboot.org/1235
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
diff --git a/util/cbfstool/common.h b/util/cbfstool/common.h
index 7034e0c..296ab2d 100644
--- a/util/cbfstool/common.h
+++ b/util/cbfstool/common.h
@@ -69,6 +69,7 @@
 int add_file_to_cbfs(void *content, uint32_t contentsize, uint32_t location);
 void print_cbfs_directory(const char *filename);
 int extract_file_from_cbfs(const char *filename, const char *payloadname, const char *outpath);
+int remove_file_from_cbfs(const char *filename);
 
 uint32_t cbfs_find_location(const char *romfile, uint32_t filesize,
 			    const char *filename, uint32_t align);