Add new patch file.

patch-cyrus-pkgconfig-file

@@ -0,0 +1,10 @@
+diff --git a/libcyrus.pc.in b/libcyrus.pc.in
+index 572436b..81cc640 100644
+--- a/libcyrus.pc.in
++++ b/libcyrus.pc.in
+@@ -5,4 +5,4 @@ Cflags: @SSL_CPPFLAGS@ @SASLFLAGS@
+ Version: @PACKAGE_VERSION@
+ Requires.private: libcyrus_min = @PACKAGE_VERSION@
+ Libs: -lcyrus
+-Libs.private: @LIB_RT@ @LIB_SASL@ @SSL_LIBS@
++Libs.private: @LIB_SASL@ @SSL_LIBS@