take sys_fork/sys_vfork/sys_clone prototypes to linux/syscalls.h

now it can be done...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/microblaze/include/asm/Kbuild b/arch/microblaze/include/asm/Kbuild
index 8653072..88a758a 100644
--- a/arch/microblaze/include/asm/Kbuild
+++ b/arch/microblaze/include/asm/Kbuild
@@ -3,3 +3,4 @@
 header-y  += elf.h
 generic-y += clkdev.h
 generic-y += exec.h
+generic-y += syscalls.h