sh: add back clone and vfork for non-NPTL

Signed-off-by: Peter S. Mazinger <ps.m@gmx.net>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

libc/sysdeps/linux/sh/Makefile.arch

@@ -9,4 +9,8 @@
 CSRC := \
 	pipe.c __init_brk.c brk.c sbrk.c pread_write.c cacheflush.c
 
-SSRC := setjmp.S __longjmp.S ___fpscr_values.S vfork.S clone.S
+SSRC := setjmp.S __longjmp.S ___fpscr_values.S
+
+ifneq ($(UCLIBC_HAS_THREADS_NATIVE),y)
+SSRC += clone.S vfork.S
+endif