On alpha and sparc64, install shared libc_r into /lib because it's aliased to libpthread and some /sbin tools need it. This is pseudo-MFC because in HEAD libthr is aliased to libpthread on sparc64 (and was on alpha).
On alpha and sparc64, install shared libc_r into /lib because
it's aliased to libpthread and some /sbin tools need it.
This is pseudo-MFC because in HEAD libthr is aliased to
libpthread on sparc64 (and was on alpha).

Approved by:	re (kensmith)

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