Pass -v0 to ghc-pkg to reduce noise in build ouput

By default ghc-pkg is quite noisy as it can't find interface files.

Test Plan:
Look at the build log stderr and see if there are lots of "cannot find
any of" errors.

Reviewers: austin, bgamari

Reviewed By: bgamari

Subscribers: thomie, snowleopard

Differential Revision: https://phabricator.haskell.org/D3103

rules/build-package-data.mk

@@ -129,7 +129,7 @@ endif
 endif
 	"$$(ghc-cabal_INPLACE)" configure $1 $2 "$$($1_$2_dll0_MODULES)" --with-ghc="$$($1_$2_HC_CONFIG)" --with-ghc-pkg="$$($1_$2_GHC_PKG)" $$($1_CONFIGURE_OPTS) $$($1_$2_CONFIGURE_OPTS)
 ifeq "$$($1_$2_PROG)" ""
-	$$(call cmd,$1_$2_GHC_PKG) update --force $$($1_$2_GHC_PKG_OPTS) $1/$2/inplace-pkg-config
+	$$(call cmd,$1_$2_GHC_PKG) update -v0 --force $$($1_$2_GHC_PKG_OPTS) $1/$2/inplace-pkg-config
 endif
 endif # NO_GENERATED_MAKEFILE_RULES
 endif # BINDIST