llvm-3.4: Try to fix build on darwin

Signed-off-by: Shea Levy <shea@shealevy.com>
llvm-general: Fix build

Signed-off-by: Shea Levy <shea@shealevy.com>
clang: Fix linking with -flto

Signed-off-by: Shea Levy <shea@shealevy.com>
idris requires llvm-general-3.3 currently

Signed-off-by: Shea Levy <shea@shealevy.com>
pidgin: bugfix 2.10.8 -> .9

Fixes connection to some servers broken by the previous update.
arp-scan: new package

Arp-scan is a command-line tool that uses the ARP protocol to discover
and fingerprint IP hosts on the local network.

http://www.nta-monitor.com/tools-resources/security-tools/arp-scan
haskell-abstract-deque: update to version 0.2.2.1
haskell-atomic-primops: update to version 0.6
haskell-doctest: update to version 0.9.10.1
haskell-pipes-network: update to version 0.6.2
haskell-shelly: update to version 1.4.4