* Build.sh: bail out early if build failure

* Build.sh: fix manpage name
* chvt.c: Solaris:
   chvt.c:57: `TIOCSCTTY' undeclared (first use in this function)
* chvt.c: GNU/Linux:
   /tmp/ccrAeq0h.o(.text+0x5e): In function `chvt':
   : warning: warning: revoke is not implemented and will always fail
* sh.h: let it only change to .section .comment ifdef __ELF__

sh.h

@@ -1,4 +1,4 @@
-/**	$MirBSD: sh.h,v 1.18 2004/11/10 17:31:38 tg Exp $ */
+/**	$MirBSD: sh.h,v 1.19 2004/11/10 19:58:06 tg Exp $ */
 /*	$OpenBSD: sh.h,v 1.18 2004/05/31 10:36:35 otto Exp $	*/
 
 #ifndef SH_H
@@ -723,8 +723,12 @@ EXTERN	int	x_cols I__(80);	/* tty columns */
 #undef I__
 
 #ifndef __RCSID
+#ifdef __ELF__
 #define __RCSID(x)	static const char __rcsid[] \
 			GCC_FUNC_ATTR(section(".comment")) = (x)
+#else
+#define __RCSID(x)	static const char __rcsid[] = (x)
+#endif
 #endif
 
 #endif	/* ndef SH_H */