microvium: supporess new warning

sdk/lib/microvium/xmake.lua

diff --git a/sdk/lib/microvium/xmake.lua b/sdk/lib/microvium/xmake.lua
index 3b87d81..ed7b141 100644
--- a/sdk/lib/microvium/xmake.lua
+++ b/sdk/lib/microvium/xmake.lua
@@ -9,3 +9,4 @@
   add_files("../../third_party/microvium/dist-c/microvium.c")
   add_includedirs("../../include/microvium", ".")
   add_defines("CHERIOT_NO_AMBIENT_MALLOC")
+  add_cflags("-Wno-constant-logical-operand")