Add UAV format for GL_RGBA8I

GL_RGBA8I is a supported image unit format, add
its corresponding UAV format on D3D backend.

Bug: angleproject:1987
TEST=dEQP.GLES31/functional_image_load_store_2d_store_rgba8i
     dEQP.GLES31/functional_image_load_store_2d_load_store_rgba8i

Change-Id: Ib759f873c8629a644f85784a57ce141d3018e0c1
Reviewed-on: https://chromium-review.googlesource.com/c/1378888
Reviewed-by: Jiajia Qin <jiajia.qin@intel.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Xinghua Cao <xinghua.cao@intel.com>
diff --git a/src/libANGLE/renderer/d3d/d3d11/texture_format_data.json b/src/libANGLE/renderer/d3d/d3d11/texture_format_data.json
index 598fc92..a082dc2 100644
--- a/src/libANGLE/renderer/d3d/d3d11/texture_format_data.json
+++ b/src/libANGLE/renderer/d3d/d3d11/texture_format_data.json
@@ -514,6 +514,7 @@
   "R8G8B8A8_SINT": {
     "texFormat": "DXGI_FORMAT_R8G8B8A8_SINT",
     "srvFormat": "DXGI_FORMAT_R8G8B8A8_SINT",
+    "uavFormat": "DXGI_FORMAT_R8G8B8A8_SINT",
     "rtvFormat": "DXGI_FORMAT_R8G8B8A8_SINT",
     "channels": "rgba",
     "componentType": "int",
diff --git a/src/libANGLE/renderer/d3d/d3d11/texture_format_table_autogen.cpp b/src/libANGLE/renderer/d3d/d3d11/texture_format_table_autogen.cpp
index 11e059a..b4933ab 100644
--- a/src/libANGLE/renderer/d3d/d3d11/texture_format_table_autogen.cpp
+++ b/src/libANGLE/renderer/d3d/d3d11/texture_format_table_autogen.cpp
@@ -1830,7 +1830,7 @@
                                          angle::FormatID::R8G8B8A8_SINT,
                                          DXGI_FORMAT_R8G8B8A8_SINT,
                                          DXGI_FORMAT_R8G8B8A8_SINT,
-                                         DXGI_FORMAT_UNKNOWN,
+                                         DXGI_FORMAT_R8G8B8A8_SINT,
                                          DXGI_FORMAT_R8G8B8A8_SINT,
                                          DXGI_FORMAT_UNKNOWN,
                                          DXGI_FORMAT_R8G8B8A8_SINT,
@@ -2057,7 +2057,7 @@
                                          angle::FormatID::R8G8B8A8_SINT,
                                          DXGI_FORMAT_R8G8B8A8_SINT,
                                          DXGI_FORMAT_R8G8B8A8_SINT,
-                                         DXGI_FORMAT_UNKNOWN,
+                                         DXGI_FORMAT_R8G8B8A8_SINT,
                                          DXGI_FORMAT_R8G8B8A8_SINT,
                                          DXGI_FORMAT_UNKNOWN,
                                          DXGI_FORMAT_R8G8B8A8_SINT,