Minimal build in buildbot

5.5 build fails on centos5-amd64-minimal.
The reason is - that builder takes the tarball from hardy-amd64-makedist, which is broken for 5.5.

The fix will probably include the following:

• change centos5-amd64-minimal to grab tarballs from kvm-tarbake-jaunty-x86 or use a source repository. It can be done for all trees, not 5.5 only.
• create BUILD/compile-amd64-minimal and use it in the builder. This can be done in all trees, to avoid hard-coding "minimal" parameters in the builder configuration.
• fix 5.5 to build in the minimal configuration. Now it does not build without performance schema, aria, and unit tests.
• fix the tests that will fail in the minimal build