libutil/libu2s: Move strlcpy() implementation to libutils

The strlcpy() implementation in libu2s is beneficial for other tools as
well. Move the implementation to libutils and replace misc_strlcpy() in
libu2s accordingly.

Change the link order in zipl to make it build again.

Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

include/lib/util_libc.h

@@ -130,6 +130,7 @@ char *util_strcat_realloc(char *str1, const char *str2);
 void util_str_toupper(char *str);
 
 char *util_strstrip(char *s);
+size_t util_strlcpy(char *dest, const char *src, size_t size);
 
 #ifdef __cplusplus
 }