Delete toolchains from their old location

Those are now located in sub-projects under prebuilts

Change-Id: Ib809027bd071f05333280f7a58886835c9068d99
Merge "Delete toolchains from their old location"
Revert "Delete toolchains from their old location"

This reverts commit 7bec113b9fc66f8fa4ebf5d5ca91fa49e0076498.
Merge "Revert "Delete toolchains from their old location""
am 44fc5bfc: (-s ours) Merge "Delete toolchains from their old location"

* commit '44fc5bfce38dda8f7d02c37274b4995349d959bf':
  Delete toolchains from their old location
am 0b8f52a4: Merge "Revert "Delete toolchains from their old location""

* commit '0b8f52a4dadf56600b702efe9767c8a38d869b8c':
  Revert "Delete toolchains from their old location"
Revert "am 0b8f52a4: Merge "Revert "Delete toolchains from their old location"""

This reverts commit 8506eccfd5b0ccc0226d5134785471405f03e047, reversing
changes made to a7d113697ec37c5de9f562191ee4861cb2ea3aba.
replace tradefed to the latest one

- revision: 4f5ecf14475a211b36a0813e5bed9a99db4d9056

Change-Id: Iafdffabaee7688e49e3c45237859d6122e19282e
Merge android-4.1.2_r1