Add size-1 and size-2 tests

	* ld-size/size-1.c: New file.
	* ld-size/size-1.out: Likewise.
	* ld-size/size-1a.c: Likewise.
	* ld-size/size-1b.c: Likewise.
	* ld-size/size-2.c: Likewise.
	* ld-size/size-2.out: Likewise.
	* ld-size/size-2a.c: Likewise.
	* ld-size/size-2b.c: Likewise.

	* ld-size/size.exp (build_tests): Build libsize-1.so and
	libsize-2.so.
	(run_tests): Run size-1 and size-2.
Verify run-time size relocations if supported

	* ld-size/size-7.out: New file.
	* ld-size/size-8.out: Likewise.
	* ld-size/size-9.out: Likewise.
	* ld-size/size-9.rd: Likewise.
	* ld-size/size-9a.c: Likewise.
	* ld-size/size-9b.c: Likewise.
	* ld-size/size-10.out: Likewise.
	* ld-size/size-10.rd: Likewise.
	* ld-size/size-10a.c: Likewise.
	* ld-size/size-10b.c: Likewise.

	* ld-size/size.exp (build_tests): Build libsize-9.so and
	libsize-10.so.
	Run-time size relocation tests if supported.
	(run_time_tests): New.
* mmap.cc (handler_disk_file::msync): Retry up to 99 times if FlushViewOFile
fails with ERROR_LOCK_VIOLATION.