bfd/ChangeLog

	* elf64-ppc.c (ppc64_elf_size_stubs, ppc64_elf_build_stubs): Fix left
	shift of negative value.
	* libbfd.c (safe_read_leb128): Likewise.
	* dwarf2.c (place_sections): Likewise.
	* bfd-in.h (align_power): Likewise.
	* bfd-in2.h (align_power): Likewise.