Sporadic build failures in lcm-java

[rdeits]

I'm getting occasional build failures of lcm-1.3.0 in lcm-java, with error messages like the following:

cd build && /usr/bin/jar xf .././jchart2d-code/ext/xmlgraphics-commons-1.3.1.jar
java.io.IOException: META-INF : could not create directory
    at sun.tools.jar.Main.extractFile(Main.java:993)
    at sun.tools.jar.Main.extract(Main.java:924)
    at sun.tools.jar.Main.run(Main.java:264)
    at sun.tools.jar.Main.main(Main.java:1231)
make[1]: *** [build/com/jidesoft/comparator/AlphanumComparator.class] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: Leaving directory `/home/travis/.julia/v0.4/LCMGL/deps/src/lcm-1.3.0/lcm-java'
make: *** [all-recursive] Error 1
make: Leaving directory `/home/travis/.julia/v0.4/LCMGL/deps/src/lcm-1.3.0'

For example, here's a Travis log in which the build fails: https://travis-ci.org/rdeits/LCMGL.jl/jobs/117841931

It's happening with probability on my Travis-CI servers, so it appears to be some non-determinism or race condition inside the LCM build, even though I'm performing a serial build.

We've observed this before with Drake: https://github.com/RobotLocomotion/lcm-pod/issues/7 but have since switched to our own cmake-based build for LCM for that project. There's some discussion of the possible causes over at that issue.

[andybarry]

I believe this was fixed in #48.

[rdeits]

Ok, thanks!