[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)

Review URL: https://codereview.chromium.org/1037403003

Cr-Commit-Position: refs/branch-heads/2311@{#369}
Cr-Branched-From: 09b7de5dd7254947cd4306de907274fa63373d48-refs/heads/master@{#317474}
7 files changed