Mojo Bindings: Put typemap files in the build dependency tree

mojo/public/tools/bindings/blink_bindings_configuration.gni

Index: mojo/public/tools/bindings/blink_bindings_configuration.gni
diff --git a/mojo/public/tools/bindings/blink_bindings_configuration.gni b/mojo/public/tools/bindings/blink_bindings_configuration.gni
index 8598cd81e2a7fa039c9aab9333084bbdfee1e78e..cdf93b65a96b3561d3f1b66dbfd4e8e7689d1de5 100644
--- a/mojo/public/tools/bindings/blink_bindings_configuration.gni
+++ b/mojo/public/tools/bindings/blink_bindings_configuration.gni
@@ -24,7 +24,10 @@ foreach(typemap_import, _typemap_imports) {
 
 typemaps = []
 foreach(typemap, _typemaps) {
-  typemaps += [ read_file(typemap, "scope") ]
+  typemaps += [ {
+        filename = typemap
+        config = read_file(typemap, "scope")
+      } ]
 }
 
 blacklist = [