distrib/sets/lists: Add a blank comment line between RCS id and body.

This serves as a buffer between RCS id changes and other changes to
the set lists, in an attempt to reduce the pain of merge conflicts
around mass set list changes.

No functional change intended.

branches: 1.1.4;
Introduce libc_aligned.so for evbppc-powerpc32, which provides
strictly-aligned versions of memcmp(3), bcopy(3), memcpy(3), and
memmove(3).

This is used for 403 by ld.so.conf with machdep.no_unaligned variable.

With this library, unaligned memory accesses are significantly reduced
for 403 (from several hundreds to few tens per sec under heavy load);
only ld.elf_so (typically few times per fork) and statically-linked
binaries do such access.