lint: fix quoting style everywhere

BUG=chromium:990019
TEST=`cros lint` is clean & CQ passes

Change-Id: I012966d34a45a01b3a940414b24316aee4ffe8af
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/1731476
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Reviewed-by: Will Bradley <wbbradley@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
diff --git a/scripts/build_dlc.py b/scripts/build_dlc.py
index 82552fc..5adaf60 100644
--- a/scripts/build_dlc.py
+++ b/scripts/build_dlc.py
@@ -334,7 +334,7 @@
   # etc. These two arguments are required in both cases.
   parser.add_argument('--sysroot', type='path', metavar='DIR', required=True,
                       help="The root path to the board's build root, e.g. "
-                      "/build/eve")
+                      '/build/eve')
   parser.add_argument('--install-root-dir', type='path', metavar='DIR',
                       required=True,
                       help='If building a specific DLC, it is the root path to'