switch BpfBitmap key from U32 to S32

Since this is an array from 32 bit int to 64 bit int,
the S32/U32 distinction doesn't matter before we hit
a bitmap with 2 billion entries, ie. 128 billion bits,
taking up 16GiB of RAM...

But S32 is a native java int, while U32 requires long.

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I5b06e80e801e007bafb18693647d968cba905c36
1 file changed
tree: d0347f6c547a6c4d9a67bddd4799743e241b9d7e
  1. staticlibs/