Fix a compiler warning

Signed-off-by: falkTX <falktx@falktx.com>

Author: falkTX

lib/lilv/util.c

@@ -15,7 +15,7 @@
 */
 
 #define _POSIX_C_SOURCE 200809L  /* for fileno */
-#define _BSD_SOURCE     1        /* for realpath, symlink */
+#define _DEFAULT_SOURCE 1        /* for realpath, symlink */
 
 #ifdef __APPLE__
 #    define _DARWIN_C_SOURCE 1  /* for flock */