add mingw support to cpptrace (#2910)

packages/c/cpptrace/xmake.lua

@@ -20,7 +20,7 @@ package("cpptrace")
         add_syslinks("dbghelp")
     end
 
-    on_install("linux", "macosx", "windows", function (package)
+    on_install("linux", "macosx", "windows", "mingw", function (package)
         local configs = {}
         table.insert(configs, "-DCMAKE_BUILD_TYPE=" .. (package:is_debug() and "Debug" or "Release"))
         table.insert(configs, "-DBUILD_SHARED_LIBS=" .. (package:config("shared") and "ON" or "OFF"))