File fec-fix-cmake-libdir.patch of Package fec

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 185fbe1..f842504 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -239,7 +239,7 @@ endforeach()
 
 set(LIBFEC_PC_PREFIX ${CMAKE_INSTALL_PREFIX})
 set(LIBFEC_PC_EXEC_PREFIX \${prefix})
-set(LIBFEC_PC_LIBDIR \${exec_prefix}/${LIB_INSTALL_DIR})
+set(LIBFEC_PC_LIBDIR ${LIB_INSTALL_DIR})
 set(LIBFEC_PC_INCLUDEDIR \${prefix}/include)
 set(LIBFEC_PC_VERSION ${VERSION})
 set(LIBFEC_PC_LIBS "-lfec")