cmake: install pdb's when present

test/CMakeLists.txt

@@ -479,6 +479,11 @@ if(SDL_INSTALL_TESTS)
             DESTINATION ${CMAKE_INSTALL_LIBEXECDIR}/installed-tests/SDL2
         )
     endif()
+    if(MSVC)
+        foreach(test ${SDL_TEST_EXECUTABLES})
+            install(FILES $<TARGET_PDB_FILE:${test}> DESTINATION "${CMAKE_INSTALL_LIBEXECDIR}/installed-tests/SDL2" OPTIONAL)
+        endforeach()
+    endif()
     install(
         FILES ${RESOURCE_FILES}
         DESTINATION ${CMAKE_INSTALL_LIBEXECDIR}/installed-tests/SDL2