add OpenVulkano prefix to cmake options

3rdParty/msdf/CMakeLists.txt

@@ -1,4 +1,4 @@
-if (ENABLE_MSDF)
+if (OPENVULKANO_ENABLE_MSDF)
     include(FetchContent)
 
     if(NOT DEFINED MSDFGEN_REPO)
@@ -96,7 +96,7 @@ if (ENABLE_MSDF)
 endif()
 
 function(LinkMsdf TARGET)
-    if (ENABLE_MSDF)
+    if (OPENVULKANO_ENABLE_MSDF)
         target_link_libraries(${TARGET} PUBLIC msdfgen::msdfgen msdfgen::msdfgen-ext msdf-atlas-gen)
         if (FREETYPE_BUILT_FROM_SOURCES)
             target_include_directories(${TARGET} PUBLIC ${FREETYPE_INCLUDE_DIR})