Merge pull request #7583 from zhaob1n/fix/cmake-package-split-flags

fix(package): split global flags for build envs

Author: waruqi

xmake/core/package/package.lua

@@ -1289,6 +1289,9 @@ function _instance:build_envs(lazy_loading)
         setmetatable(build_envs, { __index = function (tbl, key)
             local result = {}
             local value = config.get(key)
+            if value and builtin_configs:has(key) and type(value) == "string" then
+                value = os.argv(value)
+            end
             if value == nil then
                 value = self:tool(key)
             end