Correct the Mesa version information.

Mesa was upgraded to 20.3.4 in aosp/1611880, but the METADATA file
was not updated with the new version.

Test: N/A
Change-Id: I303fd0eec4f02be5c76847e49cf6e6ffa7ce4002
diff --git a/METADATA b/METADATA
index ea134b3..dc89dbb 100644
--- a/METADATA
+++ b/METADATA
@@ -16,8 +16,8 @@
     type: GIT
     value: "git://anongit.freedesktop.org/git/mesa/mesa"
   }
-  version: "17.0.4"
-  last_upgrade_date { year: 2017 month: 5 day: 22 }
+  version: "20.3.4"
+  last_upgrade_date { year: 2021 month: 3 day: 2 }
   license_note: "would be NOTICE save for:\n"
   "   include/drm-uapi/etnaviv_drm.h\n"
   " and RESTRICTED save for:\n"
@@ -25,6 +25,6 @@
   "   docs/README.UVD"
   license_type: BY_EXCEPTION_ONLY
   security {
-    tag: "NVD-CPE2.3:cpe:/a:mesa3d:mesa:17.0.4"
+    tag: "NVD-CPE2.3:cpe:/a:mesa3d:mesa:20.3.4"
   }
 }