[v3, 3.4 & HEAD] set cpu_include_dir for mips*-*-linux* targets, update baseline file

[Paolo Carlini]

Matthias Klose wrote:

>The mips*-*-linux* targets are currently recognised as "generic".
>This seems to be wrong, as there is an old mips-linux-gnu baseline
>file. The following patch explicitely overwrites the configuration for
>the mips*-*-linux* in the last case statement.
>  
>
Hi Matthias,

in my opinion (Mark probably agrees ;) touching now configure.host is too
risky for the release branch... I can approve your changes for mainline if a
mips maintainer can approve it. In any case, this line:

>+    cpu_include_dir="cpu/mips"
>  
>
seems suspect: is really needed?

Thanks,
Paolo.