re PR pch/14940 (PCH largefile test fails on various platforms)

re PR pch/14940 (PCH largefile test fails on various platforms)

	gcc:
	PR pch/14940
	* config/host-solaris.c (HOST_HOOKS_GT_PCH_GET_ADDRESS): Redefine
	to sol_gt_pch_get_address.
	(TRY_EMPTY_VM_SPACE): Define for all combinations of 32 and
	64-bit, SPARC and x86.
	(sol_gt_pch_get_address): New function.

	gcc/testsuite:
	PR pch/14940
	* gcc.dg/pch/pch.exp: Don't XFAIL largefile.c on i?86-*-solaris2.10.

From-SVN: r157141