Add support for Chrome Ebuild Env archive to artifact service

BUG=b:193887732
TEST=run_tests

Change-Id: I6db96b107d38e2adea8d87148d15b590d29ba432
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/3027481
Tested-by: Jack Neus <jackneus@google.com>
Commit-Queue: Jack Neus <jackneus@google.com>
Reviewed-by: George Engelbrecht <engeg@google.com>
Reviewed-by: Alex Klein <saklein@chromium.org>
diff --git a/api/controller/sysroot.py b/api/controller/sysroot.py
index f8f2768..4627535 100644
--- a/api/controller/sysroot.py
+++ b/api/controller/sysroot.py
@@ -80,6 +80,7 @@
   artifact_types = {
     in_proto.ArtifactType.SIMPLE_CHROME_SYSROOT:
         sysroot.CreateSimpleChromeSysroot,
+    in_proto.ArtifactType.CHROME_EBUILD_ENV: sysroot.CreateChromeEbuildEnv,
     in_proto.ArtifactType.BREAKPAD_DEBUG_SYMBOLS: sysroot.BundleBreakpadSymbols,
     in_proto.ArtifactType.DEBUG_SYMBOLS: sysroot.BundleDebugSymbols,
   }