Added --reorder-goals to build flags

This is a workaround for haskell/cabal#1855

Makefile

@@ -3,7 +3,7 @@ NAME         := khan
 VERSION      := $(shell sed -n 's/^version: *\(.*\)$$/\1/p' $(NAME).cabal)
 BUILD_NUMBER ?= 0
 DEB          := $(NAME)_$(VERSION)+$(BUILD_NUMBER)_amd64.deb
-FLAGS        := --disable-documentation --disable-library-coverage
+FLAGS        := --disable-documentation --disable-library-coverage --reorder-goals
 DEPS         := vendor/amazonka vendor/ede
 BIN          := dist/build/$(NAME)/$(NAME)
 OUT          := dist/$(NAME)