make apk
CP librockbox.so
CP rockbox.zip
DX bin/classes.dex

UNEXPECTED TOP-LEVEL EXCEPTION:
java.util.zip.ZipException: error in opening zip file
	at java.util.zip.ZipFile.open(Native Method)
	at java.util.zip.ZipFile.<init>(ZipFile.java:131)
	at java.util.zip.ZipFile.<init>(ZipFile.java:148)
	at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:205)
	at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:130)
	at com.android.dx.cf.direct.ClassPathOpener.processDirectory(ClassPathOpener.java:190)
	at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:122)
	at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:108)
	at com.android.dx.command.dexer.Main.processOne(Main.java:247)
	at com.android.dx.command.dexer.Main.processAllFiles(Main.java:183)
	at com.android.dx.command.dexer.Main.run(Main.java:139)
	at com.android.dx.command.dexer.Main.main(Main.java:120)
	at com.android.dx.command.Main.main(Main.java:89)
1 error; aborting