squisher: Get rid of it.
The pngcrush tool does not add any noticeable value any more, such that it justifies the extra build time: 240MB vs 238MB.
The build.prop changes are now no ops, since the key for ro.kernel.android.checkjni no longer exists.
Changing the ro.build.type from eng to user is also a no op, since CM is now userdebug.
Deleting bins is also unncessary now.
Stripping modules is also unnecessary now. (plenty of space)

At this point, I think we can just symlink $OUTFILE to $OTAPACKAGE, and not even bother
with a copy.

Change-Id: I431ac6425dedb6cd02eb2d31fc9ff82b49df9f50

Conflicts:
	tools/squisher
squisher: link the target $OUTFILE.

Change-Id: I5d905fb12e7d5f5cbae0af85f229b29becaf33ef
squisher: force hardlink.

Change-Id: I5741918615d101d2553fb7cdd02b0c5242970bc9
Fix output of squisher showing escape commands

Change-Id: I15fa0279d966fe8ef65b6f318b869a234bbefad3