R1:214988fafd75

T15774: Celerity: javascript minification issue with template literals (backticked strings)

Test Plan:
This archive contains a small demo: {F2142567}
When installed, an application named D25571 appears under "More Applications".
When you start it, you will see 2 messageboxes: one should be a single lined text, the other a multilined text.

Steps:
1) unpack archive in some directory
2) add ext-D25571/src/ path to load-libraries in local.json
3) bin/arc liberate
4) bin/cache purge --all
5) bin/celerity map…