Add generate_jni template

tools/gn/secondary/third_party/zlib/BUILD.gn

Index: tools/gn/secondary/third_party/zlib/BUILD.gn
diff --git a/tools/gn/secondary/third_party/zlib/BUILD.gn b/tools/gn/secondary/third_party/zlib/BUILD.gn
index 033d4623549cdda84a7d3a8addfe8a5bbfc2d70a..945183605946455e10aedee2448624e90348ead6 100644
--- a/tools/gn/secondary/third_party/zlib/BUILD.gn
+++ b/tools/gn/secondary/third_party/zlib/BUILD.gn
@@ -83,17 +83,19 @@ static_library("minizip") {
   direct_dependent_configs = [ ":zlib_config" ]
 }
 
-static_library("zip") {
-  sources = [
-    "google/zip.cc",
-    "google/zip.h",
-    "google/zip_internal.cc",
-    "google/zip_internal.h",
-    "google/zip_reader.cc",
-    "google/zip_reader.h",
-  ]
-  deps = [
-    ":minizip",
-    "//base",
-  ]
+if (!is_android) {
+  static_library("zip") {
+    sources = [
+      "google/zip.cc",
+      "google/zip.h",
+      "google/zip_internal.cc",
+      "google/zip_internal.h",
+      "google/zip_reader.cc",
+      "google/zip_reader.h",
+    ]
+    deps = [
+      ":minizip",
+      "//base",
+    ]
+  }
 }