build: remove -Wl,--no-as-needed and libiptc.so

Despite the presence of --no-as-needed, the libiptc.so library as
produced inside the openSUSE Build Service has no links to
libip4tc.so or libip6tc.so. I have not looked into why --no-as-needed
is ignored in this instance, but likewise, the situation must have
been like that ever since openSUSE made as-needed a distro-wide
default (gcc 4.8 timeframe or so).

Since I am not aware of any problem reports within SUSE/openSUSE
about this whole situation, it seems safe to assume no one in the
larger scope is still using a bare "-liptc" on the linker command
line and that all parties have moved on to using pkg-config.

Therefore, libiptc.la/so is hereby removed, as are all parts
related to the -Wl,--no-as-needed flag.

Signed-off-by: Jan Engelhardt <jengelh@inai.de>
Signed-off-by: Florian Westphal <fw@strlen.de>
3 files changed