Strange messages sent to stderr when using a fastdebug JDK build

[Kelly O'Hair]

I'm seeing all kinds of messages like:

bit length overflow
code 12 bits 6->7

bit length overflow
code 5 bits 6->7

bit length overflow
code 5 bits 6->7

When ever a jdk7u or jdk8 fastdebug built jdk is used.

It appears to be coming from here:

jdk/src/share/native/java/util/zip/zlib-1.2.5/trees.c: Trace((stderr,"\nbit length overflow\n"));

These stderr messages get folded into the java users stderr... I don't think we want that.

-kto