libtool: more carefully avoid automatic -Cstd -Crun on Sun Pro CXX.

* m4/libtool.m4 (_LT_FUNC_SUNCC_CSTD_ABI): New function factored out
of repeated code.  Take note of other known -Cstd incompatible
compiler flags.
(_LT_SYS_HIDDEN_LIBDEPS): Use it to determine whether -Cstd -Crun
can be safely added to postdeps with Sun Pro CXX.
* NEWS: Update.
* NO-THANKS: Add Marc Glisse.
Reported by Marc Glisse

Signed-off-by: Gary V. Vaughan <gary@gnu.org>