Upgrade to clhep 2.1.2.2. Fixes compile error with clang.
Builds in parallel. Remove ENV.j1. Passes `make test` on Lion
and Snow Leopard with five compilers from Xcode-4.3.1 and 4.0.2.
ClosesHomebrew/homebrew#11080.
Signed-off-by: Adam Vandenberg <flangy@gmail.com>