at: disable linking with libpam

In case the host has security/pam_appl.h, the at configure script will
decide to link against libpam, we do not want that.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/packages@39866 3c298f89-4303-0410-b956-a3cf2f4a3e73
l7-protocols: pass our CFLAGS and CXXFLAGS

All the testing utilities were not using our CFLAGS or CXXFLAGS fix
that.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/packages@39867 3c298f89-4303-0410-b956-a3cf2f4a3e73