RISC-V: Moved syscalls to separate files to fix aliasing problems.

libgloss/riscv/sys_ftime.c

@@ -0,0 +1,10 @@
+#include <machine/syscall.h>
+#include <sys/timeb.h>
+
+/* Get the current time.  Only relatively correct.  */
+int
+_ftime(struct timeb *tp)
+{
+  tp->time = tp->millitm = 0;
+  return 0;
+}