Reviewed-by: alanb, malenkov, mullan

Summary: Correct the behavior of available() and update related java specs for available() and skip() in InputStream and FileInputStream classes.
Reviewed-by: alanb

Summary: Remove the check in the native code to allow negative values
Reviewed-by: mchung

Reviewed-by: chegar, ksrini

7030573: test/java/io/FileInputStream/LargeFileAvailable.java fails when there is insufficient disk space
Reviewed-by: alanb

Reviewed-by: dholmes

Reviewed-by: chegar, sherman

Reviewed-by: xdono

Reviewed-by: alanb

Reviewed-by: ohair, sherman

Reviewed-by: darcy, weijun