Revert "add all dependencies needed by libgcc and associates for aix"

This reverts commit 19721c335ae2b8cc6edadeefb1d3eb722c8b60db.

It introduces way more problems than it solves, and in general it is
not safe to assume that the very platform specific libraries libc and
libpthread are going to work on all platforms we install the AIX
package on. This unfortunately also means that we cannot support AIX
platforms with a lower patch level than our build machine.

Redmine #6679.

Conflicts:

	deps-packaging/libgcc/cfbuild-libgcc.spec
(cherry picked from commit 7992a894b49f9a0c56729723fecd95fec94a3ca0)
Redmine #6678: Prevent installation on AIX boxes with old libraries.

We specify libc/pthread dependencies to avoid linking error at run
time.
(cherry picked from commit 03327de62e22e87139e9475b142745e2c180eb58)
Bump minor-patch level for AIX.

We needed one more fix in the packaging, but the 3.6.2 package was
already out.
Revert "Bump minor-patch level for AIX."

It was a one-off for building a package. Not needed in the future.

This reverts commit b7e0e8499add40542790f876d877ea2f436e9374.
Merge branch '3.6.2-aix-fixes' into 3.6.x