CHROMIUM: Fix autoconf --enable flags

A recent change disabled building the udev-bridge when the udev_bridge
USE flag is not specified, which disabled building the udev-bridge when
the USE flag is enabled due to an autoconf config error.

The AC_ARG_ENABLE "action-if-given" parameter is configured to set
udev_bridge=no, but this action is executed when both the --enable and
--disable flags are specified, which disables building of the
udev-bridge when the --enable-udev-bridge flag is specified.

The correct action is to assign ${enableval} which by default assigns
yes/no based on whether the --enable or --disable flag is specified.

All other AC_ARG_ENABLE options are also fixed.

BUG=none
TEST=udev bridge builds correctly with udev_bridge USE flag

Change-Id: Ib6a1d020bc870ddf114d45b654564df04ce19368
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/upstart/+/5528501
Reviewed-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Allen Webb <allenwebb@google.com>
Commit-Queue: Ian Tessier <itessier@google.com>
Tested-by: Ian Tessier <itessier@google.com>
1 file changed