PATCH: Fix ARM bootstrap problem with mangle.c

[Richard Earnshaw]

> 
> Richard --
> 
> Zack and I agree that including "tm_p.h" in mangle.c is the right
> short-term fix.  (Longer-term, we'd like to get target dependencies
> further out of the front ends.)
> 
> Hopefully this patch will fix the problem you're seeing.

Thanks.
> 
> Tested on i686-pc-linux-gnu, applied on the mainline.
> 

I believe Zack's change was committed to the 3.3 branch as well, so it is 
needed there also.

R.