[12] RFR(S): ARM: cleanup maybe-uninitialized and reorder compiler warnings

[Aleksei Voitylov]

Hi,

please review this patch to cleanup -Wreorder and -Wmaybe-uninitialized 
gcc warnings on ARM32:

Webrev: http://cr.openjdk.java.net/~avoitylov/8209380/
Bug: https://bugs.openjdk.java.net/browse/JDK-8209380

With this patch, ARM32 builds without warnings.

Thanks,

-Aleksei