bcp-1.c: Replace abort in arg of __builtin_constant_p with a generic external function.

bcp-1.c: Replace abort in arg of __builtin_constant_p with a generic external function.

gcc/testsuite:
	* c-torture/execute/bcp-1.c: Replace abort in arg of
	__builtin_constant_p with a generic external function.

	* gcc.dg/20000108-1.c, gcc.dg/980211-1.c, gcc.dg/980414-1.c,
	gcc.dg/990119-1.c, gcc.dg/990409.c, gcc.dg/990424-1.c,
	gcc.dg/991230-1.c, gcc.dg/clobbers.c, gcc.dg/lineno.c,
	gcc.dg/noreturn-1.c, gcc.dg/trigraphs.c, gcc.dg/uninit-4.c:
	Prototype abort and/or exit.

	* gcc.dg/990407-1.c, gcc.dg/strpaste.c,
	gcc.dg/special/alias-1.c, gcc.dg/special/gcsec-1.c,
	gcc.dg/special/weak-1.c, gcc.dg/special/weak-2.c,
	gcc.dg/special/wkali-1.c, gcc.dg/special/wkali-2.c: Include stdlib.h.

libio/tests:
	* tfformat.c: Include stdlib.h.

From-SVN: r34110