* mkstemp.c: Include config.h even when not IN_GCC. Wrap header
inclusions inside HAVE_*_H macros. Include ansidecl.h when not
IN_GCC.
* vasprintf.c: Include stdarg.h/varargs.h first.
* vprintf.c: Likewise.
From-SVN: r22314
* pexecute.c: Updates from gcc. Copy in gcc has been removed. This
is the canonical copy. Define ISSPACE if !IN_GCC.
* alloca.c, vfprintf.c, choose-temp.c, mkstemp.c: Similarly.
* Makefile.in: Build mkstemp.o
From-SVN: r22252