Fix missing =

packages/j/joltphysics/xmake.lua

@@ -172,7 +172,7 @@ package("joltphysics")
             table.insert(configs, "-DBUILD_SHARED_LIBS=" .. (package:config("shared") and "ON" or "OFF"))
             table.insert(configs, "-DCROSS_PLATFORM_DETERMINISTIC=" .. (package:config("cross_platform_deterministic") and "ON" or "OFF"))
             table.insert(configs, "-DDOUBLE_PRECISION=" .. (package:config("double_precision") and "ON" or "OFF"))
-            table.insert(configs, "-DENABLE_OBJECT_STREAM" .. (package:config("object_stream") and "ON" or "OFF"))
+            table.insert(configs, "-DENABLE_OBJECT_STREAM=" .. (package:config("object_stream") and "ON" or "OFF"))
             table.insert(configs, "-DGENERATE_DEBUG_SYMBOLS=" .. ((package:debug() or package:config("symbols")) and "ON" or "OFF"))
             table.insert(configs, "-DOBJECT_LAYER_BITS=" .. package:config("object_layer_bits"))
             table.insert(configs, "-DUSE_AVX=" .. (package:config("inst_avx") and "ON" or "OFF"))