RFR 7151010: Add compiler support for repeating annotations

[Joel Borggrén-Franck]

Hi,

Here [1] is a webrev for the implementation of the repeating annotations feature according to the proposed specification that Alex posted [1].

The biggest change to existing code is that I needed to abstract the storage of Attributes on Symbols from a list to a container that also embeds the state of the annotation processing on the Symbol.

cheers
/Joel

[1] http://cr.openjdk.java.net/~jfranck/7151010/webrev.v10/
[2] http://mail.openjdk.java.net/pipermail/enhanced-metadata-spec-discuss/2012-August/000000.html