[PATCH, ARM] Don't pass incorrect pointer in arm_build_one_stub

[Ramana Radhakrishnan]

> > 
> > (Thanks to Doug for noticing this on mainline.)
> > 
> > OK to apply?
> 
> OK.
> 

For the record, this fixes a problem with OpenJDK builds using
mainline / Ubuntu karmic binutils where we were getting a junk stub
created for a conditional branch. Attempts to reduce this to a smaller
testcase failed. 

Could this be applied to mainline so that the folks at Ubuntu can pull
this in to their tools ?

cheers
Ramana