[sqlite backport] Fix collation dequoting.

[sqlite backport] Fix collation dequoting.

Backport https://www.sqlite.org/src/info/eddc05e7bb31fae7
"Fix a problem causing collation sequence names to be dequoted
multiple times under some circumstances."

BUG=469082
TBR=inferno@chromium.org

Review URL: https://codereview.chromium.org/1022423004

Cr-Commit-Position: refs/heads/master@{#322165}
(cherry picked from commit 3e13a01e946b7df16a5b3702ac016b5784945a90)

Committed: https://chromium.googlesource.com/chromium/src/+/90856262ae6ae80bd6f478b820515e35c21f094b

[Scott Hess - ex-Googler, 2015-03-27 22:49:57]

The CQ bit was checked by shess@chromium.org

[commit-bot: I haz the power, 2015-03-27 22:50:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1037403003/1

[commit-bot: I haz the power, 2015-03-27 22:50:13]

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

[commit-bot: I haz the power, 2015-03-27 22:50:14]

CLs for remote refs other than refs/pending/heads/master must contain NOTRY=true
in order for the CQ to process them

[Scott Hess - ex-Googler, 2015-03-27 22:54:49]

Committed patchset #1 (id:1) manually as
90856262ae6ae80bd6f478b820515e35c21f094b (presubmit successful).