define ROKEN_LIB_FUNCTION on all exported functions

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@14773 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/roken/hex.c

@@ -53,7 +53,7 @@ pos(char c)
     return -1;
 }
 
-ssize_t
+ssize_t ROKEN_LIB_FUNCTION
 hex_encode(const void *data, size_t size, char **str)
 {
     const unsigned char *q = data;
@@ -79,7 +79,7 @@ hex_encode(const void *data, size_t size, char **str)
     return i * 2;
 }
 
-ssize_t
+ssize_t ROKEN_LIB_FUNCTION
 hex_decode(const char *str, void *data, size_t len)
 {
     size_t l;