Subject: remove Reqires.private from libcacard.pc
From: Michael Tokarev <mjt@tls.msk.ru>
Bug-Debian: http://bugs.debian.org/804289

Since we're not providing static library, Requires.private is not used.
But pkg-config complains about missing dependensies even if they're not
used.

--- a/libcacard.pc.in
+++ b/libcacard.pc.in
@@ -10,1 +10,0 @@ Name: cacard
-Requires.private: nss