building toolchain for ppc64

[Steve Munroe]

You will need the new 2.4.20 kernel since we "fixed" signal's and
ucontext.h which impacted both the kernel and glibc.

When you build glibc you MUST use the kernel headers from the new PPC64
kernel and not the headers from /usr/include/asm (the default from where
the installed glibc was built).  When you configure glibc use "
--with-headers=${your_new_kernel_header_path}"


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