Allow a PCH to be mapped to a different address

First, try mapping the PCH to its original address. If that fails, try
letting the system choose one; the PCH can be relocated thereafter.

Reference: https://gcc.gnu.org/pipermail/gcc-patches/2022-May/594556.html

2022-05-11  LIU Hao <lh_mouse@126.com>
Signed-off-by: Jonathan Yong <10walls@gmail.com>

	PR pch/14940

gcc/ChangeLog:
	* config/i386/host-mingw32.cc (mingw32_gt_pch_use_address):
	Replace the loop that attempted to map the PCH only to its
	original address with more adaptive operations

(cherry picked from commit 16e301adf7b653c72d5c3cae1c7287877f3f20ff)