fix boost links again

packages/b/boost/xmake.lua

@@ -47,7 +47,7 @@ package("boost")
     on_load("windows", function (package)
         local vs_runtime = package:config("vs_runtime")
         for _, libname in ipairs(libnames) do
-            local linkname = "boost_" .. libname
+            local linkname = (package:config("shared") and "boost_" or "libboost_") .. libname
             if package:config("multi") then
                 linkname = linkname .. "-mt"
             end