Don't persist LDFLAGS into package database.

https://bugs.gentoo.org/609624
diff --git a/network.buildinfo.in b/network.buildinfo.in
index 69e63a6..2079179 100644
--- a/network.buildinfo.in
+++ b/network.buildinfo.in
@@ -2,3 +2,2 @@ ghc-options: -DCALLCONV=@CALLCONV@ @EXTRA_CPPFLAGS@
 ghc-prof-options: -DCALLCONV=@CALLCONV@ @EXTRA_CPPFLAGS@
-ld-options: @LDFLAGS@
 cc-options: -DCALLCONV=@CALLCONV@ @EXTRA_CPPFLAGS@