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

libgloss/riscv/sys_sysconf.c

@@ -0,0 +1,17 @@
+#include <machine/syscall.h>
+#include <unistd.h>
+#include <time.h>
+
+/* Get configurable system variables.  */
+
+long
+_sysconf(int name)
+{
+  switch (name)
+    {
+    case _SC_CLK_TCK:
+      return CLOCKS_PER_SEC;
+    }
+
+  return -1;
+}