autotest_quickmerge: add autotest-deps as a downgraded ebuild

Prior to this, after running
$ autotest_quickmerge --board=[board]
and then
$ ./build_packages --board=[board]

The profilers and deps packages were not being restored to the sysroot
autotest package directory. This CL fixes that behavior.

BUG=None
TEST=autotest_quickmerge; build_packages; profiler packages reappear.

Change-Id: Ifc91385ffb4f7fd826780c3333faa277b8e131d3
Reviewed-on: https://chromium-review.googlesource.com/168860
Tested-by: Aviv Keshet <akeshet@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Aviv Keshet <akeshet@chromium.org>
diff --git a/scripts/autotest_quickmerge.py b/scripts/autotest_quickmerge.py
index c2f2157..44afa13 100644
--- a/scripts/autotest_quickmerge.py
+++ b/scripts/autotest_quickmerge.py
@@ -32,6 +32,7 @@
 AUTOTEST_PROJECT_NAME = 'chromiumos/third_party/autotest'
 AUTOTEST_EBUILD = 'chromeos-base/autotest'
 DOWNGRADE_EBUILDS = ['chromeos-base/autotest',
+                     'chromeos-base/autotest-deps',
                      'chromeos-base/autotest-tests',
                      'chromeos-base/autotest-chrome',
                      'chromeos-base/autotest-factory',