Comment # 12 on bug 1062807 from Fridrich Strba

Submitted two submitrequests:

1) https://build.opensuse.org/request/show/535787 to make tuxguitar build with
java source and target levels 1.6 so that it can be run by any java version in
Tumbleweed. And it is still buildable with openjdk9, for which the
source/target level 1.6 is the lowest supported. Would be good if this trickled
up to Factory.

2) https://build.opensuse.org/request/show/535788 specifying the right
architecture in the META_INF/MANIFEST.INF file. When it hits Factory, the issue
will be fixed.

I tried it locally with those two changes on x86_64 and tuxguitar starts
correctly with all java7, 8 and 9.