regen powerpc64.

branches: 1.2.2;
partial mknative-gcc for gcc 4.8 and ppc64.

branches: 1.1.2; 1.1.8;
mknative-gcc for powerpc64.

Rebase to HEAD as of a few days ago.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs. ("Protocol error: too many arguments")

Rebase.