icedtea7-native: use zero mode interpreter instead of hotspot
icedtea7-native: use zero mode interpreter instead of hotspot

icedtea7-native build fails at least under Fedora 22. Hotspot has a massive
memory leak and quickly uses up all system ram and swap. This is likely due to
a bug that manifests itself when icedtea7-native is compiled with GCC 5.1, as
GCC 4.92 works just fine. As a workaround, hotspot is disabled in favour of
interpreter only mode.

Signed-off-by: Erkka Kääriä <bde0a4a3fc20ec41a2078c0a59a257d075b85756@intel.com>

Valtis/meta-java,Valtis/meta-java,Valtis/meta-java