[doc, committed] document RL78 saddr attribute

I've checked in this patch to add some minimal documentation for the RL78 "saddr" variable attribute. -Sandra 2016-01-05 Sandra Loosemore PR 1078 gcc/ * doc/extend.texi (RL78 Variable Attributes): New section. Index: gcc/doc/extend.texi

Re: [doc, committed] document RL78 saddr attribute

> I've checked in this patch to add some minimal documentation for the > RL78 "saddr" variable attribute. That's pretty much all there is to say about the saddr attribute, too.