maint: bump copyright to 2014

Done via 'make update-copyright', since all files are effectively
modified and distributed this year via public version control.

* all files: Update copyright year.
maint: fix 'make syntax-check' findings

Fix syntax check warnings that are unrelated to the new copyright
year.

* lib/local.mk (lib/autoscan/autoscan.list): Reduce indent, to
avoid mix of tab and 8 spaces.
* bin/local.mk (bin/autoconf.in): Likewise.
* lib/autoconf/c.m4 (_AC_CXX_CXX98_TEST_BODY): Use consistent case
in message.

Signed-off-by: Eric Blake <eblake@redhat.com>
tests: don't let config.site affect testsuite

Test 236 "configure directories" failed for me on 64-bit Fedora 20;
it boiled down to the system's config.site causing libdir to
default to /usr/lib64 instead of the autoconf default of /usr/lib.

* tests/base.at (configure directories): Neutralize any preinstalled
config.site from the system.

Signed-off-by: Eric Blake <eblake@redhat.com>