cmake: install knsrc files in newer ECM 5.58.0+ location

kpat already requires this version

libkcardgame/CMakeLists.txt

@@ -21,4 +21,4 @@ generate_export_header(kcardgame BASE_NAME libkcardgame)
 target_link_libraries( kcardgame KF5::NewStuff KF5::GuiAddons Qt5::Svg KF5::Completion KF5::I18n)
 
 install( TARGETS kcardgame ${KDE_INSTALL_TARGETS_DEFAULT_ARGS} )
-install( FILES kcardtheme.knsrc  DESTINATION  ${KDE_INSTALL_CONFDIR} )
+install( FILES kcardtheme.knsrc DESTINATION ${KDE_INSTALL_KNSRCDIR} )

themes/CMakeLists.txt

@@ -18,5 +18,5 @@ set( kpat_themes
 
 install( FILES ${kpat_themes} DESTINATION  ${KDE_INSTALL_DATADIR}/kpat/themes )
 
-install( FILES kpat.knsrc  DESTINATION  ${KDE_INSTALL_CONFDIR} )
+install( FILES kpat.knsrc DESTINATION ${KDE_INSTALL_KNSRCDIR} )