cros_run_unit_tests: Log the unit test command

BUG=chromium:365301
TEST=Emerged cros-testutils to chroot and ran cros_run_unit_tests.

Change-Id: I98014513db2cd7ac60d1c2e9160a8620c3ed7f6e
Reviewed-on: https://chromium-review.googlesource.com/195809
Tested-by: Aviv Keshet <akeshet@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Aviv Keshet <akeshet@chromium.org>
diff --git a/cros_run_unit_tests b/cros_run_unit_tests
index 85ff912..7bc0b48 100755
--- a/cros_run_unit_tests
+++ b/cros_run_unit_tests
@@ -127,8 +127,12 @@
     printf '%s\n' ${TEST_PACKAGE_LIST} | sort
     exit 0
   else
-    sudo -E PKGDIR="/build/${FLAGS_board}/test-packages" FEATURES="test" \
-      ${EMERGE_BOARD_CMD} --nodeps --buildpkgonly ${TEST_PACKAGE_LIST}
+    cmd=( sudo -E PKGDIR="/build/${FLAGS_board}/test-packages"
+          FEATURES="test" ${EMERGE_BOARD_CMD} --nodeps --buildpkgonly )
+    info "Running unit tests with command ${cmd[*]}"
+    info "Unit tests will run for the following packages:"
+    info ${TEST_PACKAGE_LIST}
+    "${cmd[@]}" ${TEST_PACKAGE_LIST}
   fi
 fi