[binutils-gdb] PR 19264 looping in ppc64_elf_size_stubs

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT c9301e31817019c38ab52da0e72fa1e3bf75332c ***

Author: Alan Modra <amodra@gmail.com>
Branch: master
Commit: c9301e31817019c38ab52da0e72fa1e3bf75332c

PR 19264 looping in ppc64_elf_size_stubs

b399102 fixed the testcase in this PR but it may be possible to
trigger the problem in other ways.

	PR ld/19264
	* elf64-ppc.c (STUB_SHRINK_ITER): Define.
	(ppc64_elf_size_stubs): Exit stub sizing loop past STUB_SHRINK_ITER
	if shrinking stubs.
	(ppc64_elf_size_stubs): Adjust to suit.