* alloca-conf.h: Revise based on autoconf-2.61, autoconf-2.13
	documentation.
bfd/
	* elf32-m68hc1x.c: Include alloca-conf.h.
	* xsym.c: Likewise.
	* elf64-hppa.c: Likewise.  Remove existing #if's handling alloca.
	* som.c: Likewise.
	* Makefile.am: Run "make dep-am".
	* Makefile.in: Regenerate.
binutils/
	* sysdep.h: Include alloca-conf.h instead of config.h and remove
	existing #if's handling alloca.
	* Makefile.am: Run "make dep-am".
	* Makefile.in: Regenerate.
gas/
	* as.h: Include alloca-conf.h instead of config.h and remove
	existing #if's handling alloca.
	* Makefile.am: Run "make dep-am".
	* Makefile.in: Regenerate.
opcodes/
	* Makefile.am: Run "make dep-am".
	* Makefile.in: Regenerate.
	* openrisc-opc.c: Regenerate.
ld/
	* ld.h: Remove alloca handling.