File Botan-fix_pkgconfig.patch of Package Botan

--- src/build-data/botan.pc.in.orig	2016-05-13 00:48:09.219402555 +0200
+++ src/build-data/botan.pc.in	2016-05-13 00:48:57.479714720 +0200
@@ -1,6 +1,6 @@
 prefix=%{prefix}
 exec_prefix=${prefix}
-libdir=${prefix}/%{libdir}
+libdir=%{libdir}
 includedir=${prefix}/include/botan-%{version_major}.%{version_minor}
 
 Name: Botan