Fix Cloud Build for vpython.

Bug: 993053
Change-Id: I9af5bbf7c715701ba403e2b7ab2e720a1792fb0c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/247149
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Joe Gregorio <jcgregorio@google.com>
diff --git a/docker/skia-release/Dockerfile b/docker/skia-release/Dockerfile
index 952e959..e59e248 100644
--- a/docker/skia-release/Dockerfile
+++ b/docker/skia-release/Dockerfile
@@ -11,8 +11,6 @@
   && groupadd -g 2000 skia \
   && useradd -u 2000 -g 2000 --home-dir /workspace/__cache skia
 
-USER skia
-
 ADD --chown=skia:skia https://storage.googleapis.com/swiftshader-binaries/OpenGL_ES/Latest/Linux/libGLESv2.so /usr/local/lib/libGLESv2.so
 ADD --chown=skia:skia  https://storage.googleapis.com/swiftshader-binaries/OpenGL_ES/Latest/Linux/libEGL.so /usr/local/lib/libEGL.so
 RUN cd /tmp \
@@ -46,7 +44,8 @@
   && ./bin/fetch-gn \
   && ./bin/gn gen out/Static \
   && git rev-parse HEAD > VERSION \
-  && /tmp/depot_tools/ninja -C out/Static
+  && /tmp/depot_tools/ninja -C out/Static \
+  && chown -R skia:skia .
 
 # Uncomment the lines below and update the ref to patch in a CL.
 #