bad threaded-runtime check

[Clint Adams <clint@debian.org>]

At least these packages appear to be checking for libHSrts_thr.a in the wrong directory.
Should we fix anything for wheezy?

./haskell-yesod/rules:DEB_SETUP_GHC_CONFIGURE_ARGS := $(shell test -e /usr/lib/ghc-$(GHC_VERSION)/libHSrts_thr.a || echo --flags=-threaded)
./hlint/rules:DEB_SETUP_GHC_CONFIGURE_ARGS := $(shell test -e /usr/lib/ghc-$(GHC_VERSION)/libHSrts_thr.a || echo --flags=-threaded) --datasubdir=/usr/share/hlint
./hbro/rules:DEB_SETUP_GHC_CONFIGURE_ARGS := $(shell test -e /usr/lib/ghc-$(GHC_VERSION)/libHSrts_thr.a || echo --flags=-threaded)
./haskell-hledger/rules:DEB_SETUP_GHC_CONFIGURE_ARGS := $(shell test -e /usr/lib/ghc-$(GHC_VERSION)/libHSrts_thr.a || echo --flags=-threaded)
./haskell-aeson/rules:DEB_SETUP_GHC_CONFIGURE_ARGS += $(shell test -e /usr/lib/ghc-$(GHC_VERSION)/libHSrts_thr.a || echo --flags=-threaded)