ARM interpreter bug fixes

[Andrew Haley]

Edward Nevill wrote:
> Hi folks,
> 
> Two bug fixes here,
> 
> 1) irem of negative number returns positive.
> 
> This was introduced in my last checkin. The new dispatch code corrupted the
> flags inc. the N flags so irem didn't handle -ve nos.
> 
> 2) icedtea-debug build fails.
> 
> The ARM assembler still does not build for icedtea-debug, however at least
> with this patch it will not fall over in the test_gamma, instead it builds
> a C only vsn.
> 
> Changelog to follow

Great, ta.

Andrew.