[ARM] Fix CountOnes() function

This function is only used on arms. It does not work on numbers
greater than 255:
For some reason ULL suffix was added to 2 masks, that should be
32bit, and losing the higher bits are actually the desired
behaviour.

Change-Id: Ia4b78b5c1df9547548fc7980cec4b84349e868bc
Reviewed-on: http://gerrit.cloudera.org:8080/20736
Reviewed-by: Alexey Serbin <alexey@apache.org>
Tested-by: Kudu Jenkins
1 file changed