Update VE core submodule to master (8fb94f1)

New changes:
80b26bc ve.ce.Surface: Insert new paragraphs after empty nodes rather than before
c2b06b2 ve.ui.AnnotationInspector: Apply existing annotations to inserted content
de5eef0 Strip Start/EndFragment comments from paste
79f632b Localisation updates from https://translatewiki.net.
21eab72 Update OOjs UI to v0.1.0-pre (073f37e258)

Change-Id: I78c3c29ea05ccf136b28bd2a521337d624e0702a