Exclude all except jar dependcies from proguard -injar parameters

[tprochazka]

This pull request will fix this issue:
https://code.google.com/p/maven-android-plugin/issues/detail?id=319

Before Proguard was called also with .so or any other dependency type except .apklib. Now only .jar is propagated as -injars parameters.

[mosabua]

Does this work with the examples projects? Is it backwards compatible because the other types basically did not work before anyway?

[tprochazka]

I tested it only on my project and by included unit tests.
By example project you mean this https://github.com/jayway/maven-android-plugin-samples?
I will test it.
But I can imagine reason why it should not work, because -injar parameters is designed only for jar, proguard can't work with any other dependency type or you know about some?

[tprochazka]

I just try to test latest snapshot with this my patch included and all tests passed, except:

Android NDK - Java Native Mixed with APKLIB Dependency Sample FAILURE [0.669s]

[ERROR] Failed to execute goal com.jayway.maven.plugins.android.generation2:android-maven-plugin:3.5.4-SNAPSHOT:ndk-build (default) on project mixed-java-native-with-apklib-dependency: Source 'D:_PJa
zyky_Android_libs_maven\maven-android-plugin-samples\native\mixed-java-native-with-apklib-dependency\target\ndk-libs\armeabi\libmixed-java-native-with-apklib-dependency.so' does not exist -> [Help
1]

But this is not related to my changes and it fail also without my change.

[tprochazka]

And what block this pull request?

[mosabua]

I just have not had time to test it yet. I am hoping to do that next week and include it in the release..