Adding SH support to glibc-2.2

[NIIBE Yutaka]

Ulrich Drepper wrote:
 > Alright, done.  One last question: which is the earliest kernel you
 > want to support?

That's 2.4.0.  Is it OK for you, Kaz?

Let me explain more.  Kaz and I began the kernel port independently
for 2.2.x.  Kaz for SH-4, me for SH-3.  While Kaz finished his port
for SH-4 with 2.2.x, I moved to 2.3.x.  The merge has been done around
end of 2.3.x, say, 2.3.99-pre9 works both (SH-3 and SH-4).

Most of the port of GNU C library was done by Kaz.
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