better use of AC_LIBOBJ, part 1

[Bruno Haible]

For reasons explained in [1], I'm starting to move all AC_LIBOBJ invocations
to the module description. In particular, this will make it possible again
to use AC_REQUIRE in an unlimited way without introducing subtle bugs.

Here are the proposed first 7 patches, along with a normal bug fix.

[1] http://lists.gnu.org/archive/html/bug-gnulib/2011-05/msg00174.html

-- 
In memoriam Peter van Pels <http://en.wikipedia.org/wiki/Peter_van_Pels>

0001-alphasort-Move-AC_LIBOBJ-invocations-to-module-descr.patch
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0004-btowc-Move-AC_LIBOBJ-invocations-to-module-descripti.patch
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0003-atoll-Move-AC_LIBOBJ-invocations-to-module-descripti.patch
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0002-argz-Move-AC_LIBOBJ-invocations-to-module-descriptio.patch
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0005-calloc-posix-calloc-gnu-Move-AC_LIBOBJs-to-module-de.patch
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0008-chdir-long-Move-AC_LIBOBJ-invocations-to-module-desc.patch
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0006-canonicalize-lgpl-Move-AC_LIBOBJ-invocations-to-modu.patch
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0007-canonicalize-lgpl-Fix-autoconf-macro-ordering-bug.patch
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