Fix Python error in build-webapp.py:parseBool()

Fix Python error in build-webapp.py:parseBool()

Problem only repros when trying to build with
XMPP_SERVER_USE_TLS=[anything], which is probably why this
went unnoticed.

Committed: https://crrev.com/85b72195abaf3d2f2f5b46abe36fd8179fbb3a99
Cr-Commit-Position: refs/heads/master@{#329165}

[Lambros, 2015-05-08 23:08:22]

lambroslambrou@chromium.org changed reviewers:
+ garykac@chromium.org

[garykac, 2015-05-08 23:20:46]

The CQ bit was checked by garykac@chromium.org

[garykac, 2015-05-08 23:20:46]

lgtm

[commit-bot: I haz the power, 2015-05-08 23:30:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1122403004/1

[commit-bot: I haz the power, 2015-05-09 03:51:02]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-05-09 03:51:04]

Try jobs failed on following builders:
  android_chromium_gn_compile_dbg on tryserver.chromium.linux (JOB_TIMED_OUT, no
build URL)
  android_chromium_gn_compile_rel on tryserver.chromium.linux (JOB_TIMED_OUT, no
build URL)
  cast_shell_android on tryserver.chromium.linux (JOB_TIMED_OUT, no build URL)
  cast_shell_linux on tryserver.chromium.linux (JOB_TIMED_OUT, no build URL)
  chromium_presubmit on tryserver.chromium.linux (JOB_TIMED_OUT, no build URL)
  linux_chromium_asan_rel_ng on tryserver.chromium.linux (JOB_TIMED_OUT, no
build URL)
  linux_chromium_chromeos_compile_dbg_ng on tryserver.chromium.linux
(JOB_TIMED_OUT, no build URL)
  linux_chromium_chromeos_ozone_rel_ng on tryserver.chromium.linux
(JOB_TIMED_OUT, no build URL)
  linux_chromium_chromeos_rel_ng on tryserver.chromium.linux (JOB_TIMED_OUT, no
build URL)
  linux_chromium_clobber_rel_ng on tryserver.chromium.linux (JOB_TIMED_OUT, no
build URL)
  linux_chromium_gn_chromeos_rel on tryserver.chromium.linux (JOB_TIMED_OUT, no
build URL)
  linux_chromium_gn_dbg on tryserver.chromium.linux (JOB_TIMED_OUT, no build
URL)
  linux_chromium_gn_rel on tryserver.chromium.linux (JOB_TIMED_OUT, no build
URL)
  linux_chromium_rel_ng on tryserver.chromium.linux (JOB_TIMED_OUT, no build
URL)
  mac_chromium_compile_dbg_ng on tryserver.chromium.mac (JOB_TIMED_OUT, no build
URL)
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_TIMED_OUT, no build URL)

[Lambros, 2015-05-11 16:12:52]

The CQ bit was checked by lambroslambrou@chromium.org

[commit-bot: I haz the power, 2015-05-11 16:15:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1122403004/1

[commit-bot: I haz the power, 2015-05-11 17:06:48]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-11 17:07:50]

Patchset 1 (id:??) landed as
https://crrev.com/85b72195abaf3d2f2f5b46abe36fd8179fbb3a99
Cr-Commit-Position: refs/heads/master@{#329165}