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

diff --git a/util-linux/more.c b/util-linux/more.c
index 0a21a9a..ee559b1 100644
--- a/util-linux/more.c
+++ b/util-linux/more.c
@@ -52,7 +52,7 @@
 
 #define CONVERTED_TAB_SIZE 8
 
-int more_main(int argc, char **argv);
+int more_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int more_main(int argc, char **argv)
 {
 	int c = c; /* for gcc */