build-sys: Relocate library to library/

All the dependent programs needed to have their includes moved too

Signed-off-by: Craig Small <csmall@dropbear.xyz>

library/include/devname.h

@@ -0,0 +1,10 @@
+#ifndef PROC_DEVNAME_H
+#define PROC_DEVNAME_H
+
+#define ABBREV_DEV  1     /* remove /dev/         */
+#define ABBREV_TTY  2     /* remove tty           */
+#define ABBREV_PTS  4     /* remove pts/          */
+
+unsigned dev_to_tty(char *__restrict ret, unsigned chop, dev_t dev_t_dev, int pid, unsigned int flags);
+
+#endif