[BugFix][iOS] Fix LynxServiceAPI header search path

Author: ykai55

platform/darwin/ios/lynx_service_api/BUILD.gn

@@ -36,7 +36,10 @@ podspec_target("LynxServiceAPI_podspec") {
       CLANG_CXX_LANGUAGE_STANDARD = "gnu++17"
       OTHER_CPLUSPLUSFLAGS =
           "-fno-aligned-allocation -fno-c++-static-destructors -std=gnu++17"
-      HEADER_SEARCH_PATHS = [ "../../../.." ]
+      HEADER_SEARCH_PATHS = [
+        "../../../..",
+        "//",
+      ]
     }
     if (!is_debug) {
       pod_target_xcconfig.GCC_PREPROCESSOR_DEFINITIONS += [ "NDEBUG=1" ]