am c29df57e: am 522ab34d: AI 149272: Mark 1.5r1 as a "non-current" release, with pointer to 1.5r2.   BUG=1790234

Merge commit 'c29df57e5abb09c7e1ceed153e8f2b906f522d7b'

* commit 'c29df57e5abb09c7e1ceed153e8f2b906f522d7b':
  AI 149272: Mark 1.5r1 as a "non-current" release, with pointer to 1.5r2.