Sparc assembly syntax

Hello,

As others mentioned, Anton is working on a significant cleanup to help
unify the asm printers. If you need to do this in the short term, I'd
add an "isTargetELF()" method to the SparcSubtarget class, and have it
autodetect it from the target triple as the x86 backend does. With
that, you can predicate the output based on whether the target is elf
or not.

Please wait for few days, I'll switch SPARC to new section stuff soon after I will return from US.
Also, which subtargets we will want to support on Sparc? Solaris and ELF, right?