Enable debug symbols for JoltC by default on MSVC

CMakeLists.txt

@@ -42,6 +42,9 @@ install(TARGETS joltc DESTINATION lib)
 if(MSVC)
   target_compile_options(joltc PRIVATE /W4)
 
+  # Enable debug symbols
+  target_compile_options(joltc PRIVATE /Zi)
+
   # Ignore 'unreferenced function with internal linkage'
   target_compile_options(joltc PRIVATE /wd4505)
 else()