Do not install kicad2step build library object file.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/9944

utils/kicad2step/CMakeLists.txt

@@ -22,7 +22,7 @@ endif( MINGW )
 
 # Break the library out for re-use by both kicad2step and any qa that needs it
 # In future, this could move for re-use by other programs needing s-expr support (?)
-add_library( kicad2step_lib STATIC
+add_library( kicad2step_lib OBJECT
     ${KS2_LIB_FILES}
 )
 
@@ -77,4 +77,4 @@ endif()
 if( KICAD_WIN32_INSTALL_PDBS )
     # Get the PDBs to copy over for MSVC
     install(FILES $<TARGET_PDB_FILE:kicad2step_bin> DESTINATION ${KICAD_BIN})
-endif()
+endif()