On i386, the primary function that SYSCALL() generates is with the

__sys_ prefix.  Make END() match.  This didn't cause a compile error, but
the function size is attached to the .weak symbol, not the real one.

lib/libc/i386/sys/pipe.S

@@ -44,4 +44,4 @@ SYSCALL(pipe)
 	movl	%edx,4(%ecx)
 	movl	$0,%eax
 	ret
-END(pipe)
+END(__sys_pipe)

lib/libc/i386/sys/reboot.S

@@ -40,4 +40,4 @@ __FBSDID("$FreeBSD$");
 
 SYSCALL(reboot)
 	iret
-END(reboot)
+END(__sys_reboot)

lib/libc/i386/sys/setlogin.S

@@ -52,4 +52,4 @@ SYSCALL(setlogin)
 	movl	$0,CNAME(_logname_valid)
 #endif
 	ret				/* setlogin(name) */
-END(setlogin)
+END(__sys_setlogin)