IVGCVSW-4903 Connect axis parameter in Gather from android to ACL.

!android-nn-driver:3302

Signed-off-by: Teresa Charlin <teresa.charlinreyes@arm.com>
Change-Id: Ifbc49acb5272f8a36719bb68676e44817190537d
diff --git a/src/armnnSerializer/ArmnnSchema.fbs b/src/armnnSerializer/ArmnnSchema.fbs
index 18415ce..6a388db 100644
--- a/src/armnnSerializer/ArmnnSchema.fbs
+++ b/src/armnnSerializer/ArmnnSchema.fbs
@@ -1,5 +1,5 @@
 //
-// Copyright © 2017 Arm Ltd. All rights reserved.
+// Copyright © 2017 Arm Ltd and Contributors. All rights reserved.
 // SPDX-License-Identifier: MIT
 //
 
@@ -312,6 +312,11 @@
 
 table GatherLayer {
     base:LayerBase;
+    descriptor:GatherDescriptor;
+}
+
+table GatherDescriptor {
+    axis:int = 0;
 }
 
 /// @deprecated Use ComparisonLayer instead