grit_rules.gni: Fix missing dependency on predetermined IDs

The missing dependency would cause the resource_ids to not be
regenerated when the predetermined ids file were changed, causing
various compilation failures on bots.

BUG=904366
TBR=thestig@chromium.org

Change-Id: I310af635916e66ad7d35437d7116b2a3f7fae2a9
Reviewed-on: https://chromium-review.googlesource.com/c/1329793Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607193}

tools/grit/grit_rule.gni

@@ -336,6 +336,11 @@ template("grit") {
       # file is specified.
       inputs += [ resource_ids ]
     }
+    if (grit_predetermined_resource_ids_file != "") {
+      # If the predetermined ID file is present, the script outputs depend on
+      # it too.
+      inputs += [ grit_predetermined_resource_ids_file ]
+    }
 
     depfile = "$depfile_dir/${grit_output_name}_stamp.d"
     outputs = [ "${depfile}.stamp" ] + grit_outputs + pak_info_outputs