ObjectiveC: Fix re-parsing

Import upstream CTags fix for proper reinitialization of the ObjectiveC
parser, fixing parsing after the first call.
Verilog: Fix parsing initializers

Import upstream CTags fix for parsing Verilog initalizers
(fixes parsing of test bug2747828.v).
update-scintilla.sh: Fix displaying of the message for new files
Update Scintilla to version 3.3.4
Don't warn when trying to close a document when none are open

When using the document close keybinding, it is legitimate for the
callback to be called even if there are no documents open, so properly
check for this.

Closes [bugs:#941]
Bash: Fix handling of quoted HereDoc delimiters

Imported from upstream Scintilla bb784e214430498e91c9935bbc841c798629212f

Closes [bugs:#952]