add -fvisibility=hidden to CC flags, mark XXX_main functions
EXTERNALLY_VISIBLE. 5% size reduction of libbusybox.so

diff --git a/e2fsprogs/lsattr.c b/e2fsprogs/lsattr.c
index 5f4f872..6f4b974 100644
--- a/e2fsprogs/lsattr.c
+++ b/e2fsprogs/lsattr.c
@@ -95,7 +95,7 @@
 	}
 }
 
-int lsattr_main(int argc, char **argv);
+int lsattr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int lsattr_main(int argc, char **argv)
 {
 	getopt32(argv, "Radlv");