SelectLibraryConfigurations: Fix foreach(x IN LISTS ...) syntax

In commit 5797512c (SelectLibraryConfiguration: generate correct output
when input vars are lists, 2012-07-28) the "IN" keyword was left out.

Modules/SelectLibraryConfigurations.cmake

@@ -54,10 +54,10 @@ macro( select_library_configurations basename )
         # is set, then set optimized and debug options.
         if( CMAKE_CONFIGURATION_TYPES OR CMAKE_BUILD_TYPE )
             set( ${basename}_LIBRARY )
-            foreach( _libname LISTS ${basename}_LIBRARY_RELEASE )
+            foreach( _libname IN LISTS ${basename}_LIBRARY_RELEASE )
                 list( APPEND ${basename}_LIBRARY optimized "${_libname}" )
             endforeach()
-            foreach( _libname LISTS ${basename}_LIBRARY_DEBUG )
+            foreach( _libname IN LISTS ${basename}_LIBRARY_DEBUG )
                 list( APPEND ${basename}_LIBRARY debug "${_libname}" )
             endforeach()
             set( ${basename}_LIBRARIES "${${basename}_LIBRARY}" )