[env_lua_api,lua] Add missing header inclusions

Author: tkoeppe

dmlab2d/lib/env_lua_api/BUILD

@@ -82,6 +82,7 @@ cc_library(
         "//dmlab2d/lib/lua:stack_resetter",
         "//dmlab2d/lib/lua:table_ref",
         "//third_party/rl_api:env_c_api",
+        "@com_google_absl//absl/strings",
     ],
 )
 

dmlab2d/lib/env_lua_api/env_lua_api_test.cc

@@ -20,6 +20,7 @@
 #include <string>
 #include <vector>
 
+#include "absl/strings/str_cat.h"
 #include "absl/strings/str_split.h"
 #include "absl/strings/string_view.h"
 #include "absl/types/span.h"

dmlab2d/lib/env_lua_api/episode.cc

@@ -16,6 +16,7 @@
 
 #include "dmlab2d/lib/env_lua_api/episode.h"
 
+#include "absl/strings/str_cat.h"
 #include "dmlab2d/lib/lua/call.h"
 #include "dmlab2d/lib/lua/lua.h"
 #include "dmlab2d/lib/lua/n_results_or.h"

dmlab2d/lib/lua/read_test.cc

@@ -20,6 +20,7 @@
 #include <cstring>
 
 #include "absl/container/flat_hash_map.h"
+#include "absl/strings/str_cat.h"
 #include "absl/strings/string_view.h"
 #include "absl/types/span.h"
 #include "absl/types/variant.h"