Allow Xapian library to be found by CMake-based KDE ports.

Index: cmake/xapian-config.cmake.in
--- cmake/xapian-config.cmake.in.orig
+++ cmake/xapian-config.cmake.in
@@ -1,7 +1,7 @@
 SET(prefix "@prefix@")
 SET(exec_prefix "@exec_prefix@")
 SET(XAPIAN_SHARED @XAPIAN_CMAKE_SHARED@ CACHE BOOL "Use shared xapian library")
-SET(XAPIAN_SHARED_LIBRARY "@libdir@/libxapian@LIBRARY_VERSION_SUFFIX@@SHLIBEXT@@LIBRARY_SHARED_IMP_EXT@" CACHE FILEPATH "Shared Xapian library")
+SET(XAPIAN_SHARED_LIBRARY "@libdir@/libxapian@LIBRARY_VERSION_SUFFIX@@SHLIBEXT@.${LIBxapian_VERSION}" CACHE FILEPATH "Libraries for Xapian")
 SET(XAPIAN_STATIC_LIBRARY "@libdir@/libxapian@LIBRARY_VERSION_SUFFIX@@LIBRARY_STATIC_EXT@" CACHE FILEPATH "Static Xapian library")
 SET(XAPIAN_STATIC_DEP_LIBS "@XAPIAN_CMAKE_LIBS@" CACHE STRING "Dependencies of static xapian library")
 IF(XAPIAN_SHARED)
