Hi Guix,

IcedTea 7 is served!

Attached are two patches to

- split a build phase in icedtea6 to make it easier to reuse and replace
  phases without having to copy too much.
- add an icedtea7 package inheriting from icedtea6.

The version numbers may be a little confusing.  We are using the IcedTea
2.5.5 framework and the OpenJDK 7 sources to build a "sanitised" version
of the OpenJDK 7.  Since it's not exactly the OpenJDK that is built but
rather a cleaned up, liberated version, with IcedTea patches applied the
package name is "icedtea" rather than "openjdk".

The tests do not pass, unfortunately.  There are *some* failures that
are seen in upstream builds, but our number of test failures is larger
than that.  Some failures are probably related to the fact that I have
not added Xfvb to the native inputs for some tests; others are very
difficult for me to analyse and understand.

As with icedtea6 this package can be used as a Java Runtime environment
and as a JDK, but I obviously cannot guarantee that all components work.
I would gladly assist anyone who wants to work on making a few more
tests pass.

~~ Ricardo