ppc completely soft patches

[Roland McGrath]

> For soft-float, gcc will emit calls to these in user space, and we want 
> to use the library functions in libc, not the ones that come with 
> libgcc.

The original patch is only correct if those symbols have previously been
bound to the GLIBC_2.2 version set, which I am pretty sure is not so.  That
is my main concern, so I changed them to GLIBC_2.3.2.  But if these functions
are defined by libgcc, perahps they have a different version set normally.