Properly link flecs library

engine/libs/flecs/examples/BUILD.bazel

@@ -0,0 +1,9 @@
+cc_library(
+    name = "os-api",
+    visibility = ["//:__subpackages__"],
+    deps = ["//:flecs", "@bake//:util"],
+
+    srcs = glob(["os_api/flecs-os_api-bake/src/**/*.c", "os_api/flecs-os_api-bake/src/**/*.h"]),
+    hdrs = glob(["os_api/flecs-os_api-bake/include/**/*.h"]),
+    includes = ["os_api/flecs-os_api-bake/include"],
+)