Remove .so files from .classpath

This is fixes an error which appears for Eclipse Juno users. The error looks something like:

Archive for required library: 'libs/armeabi-v7a/libruntimecore_java.so' in project 'MITApp' cannot be read or is not a valid ZIP file
Archive for required library: 'libs/armeabi/libruntimecore_java.so' in project 'MITApp' cannot be read or is not a valid ZIP file