Updating metadata for 1.7.5
Fix IE11 sniffing. Fixes #17311.
(cherry picked from commit f58c0e19ce509398985908688a768c8fb41191b8)
(cherry picked from commit 28e1f7c31de5a407a0c095038bf851518085bffc)

Conflicts:
	sniff.js
	window.js
Fix Git revision not being correctly added to version object.

Refs #17176.
(cherry picked from commit db1705762b13234887d50f48abd5639ba0225314)

Conflicts:
	_base/kernel.js
Updating source version to 1.7.6-pre