Values in ZIP files are unsigned.

Bug: 9695860
Change-Id: I5c12dc5f3c70a9fe081adf5bf5b6b4b3a115e7e1

Conflicts:
	luni/src/main/java/java/util/zip/ZipEntry.java
	luni/src/main/java/java/util/zip/ZipFile.java
Values in ZIP files are unsigned#2

Change-Id: I438482bb8a3323f57de211b189d4a11e221018da
Merge branch 'kk_222' into katkiss

Conflicts:
	luni/src/main/java/java/util/zip/ZipEntry.java
	luni/src/main/java/java/util/zip/ZipFile.java

Change-Id: I10b80275c6a825b03817905a8896674165a480dd