hg: jdk9/sandbox/langtools: Build changes as suggest by Erik Joelsson

[jan.lahoda at oracle.com]

Changeset: 700d82d9890b
Author:    jlahoda
Date:      2015-06-02 16:49 +0200
URL:       http://hg.openjdk.java.net/jdk9/sandbox/langtools/rev/700d82d9890b

Build changes as suggest by Erik Joelsson

- make/Ctsym.gmk
+ make/gendata/Gendata-jdk.compiler.gmk