Increasing stack size to avoid error on OpenJDK 7 u40

Exact version:
    $ java -version
    java version "1.7.0_40"
    OpenJDK Runtime Environment (IcedTea 2.4.1) (ArchLinux build 7.u40_2.4.1-2-x86_64)
    OpenJDK 64-Bit Server VM (build 24.0-b50, mixed mode)
Ignoring files produced by ant build

as invoked by 'ccm create -v git:...'