Problem found when importing upstream

A problem was found when importing upstream.

This was the run output:

gbp:info: Launching uscan...
uscan warn: In directory ., downloading
  https://developer.arm.com/-/media/Files/downloads/gnu-rm/8-2019q3/RC1.1/gcc-arm-none-eabi-8-2019-q3-update-src.tar.bz2?revision=94f1f227-7a58-49c6-910d-147d82b5a863?product=GNU Arm Embedded Toolchain,Invariant,,Source,8-2019-q3-update failed: 404 The specified blob does not exist.
uscan warn: No upstream tarball downloaded. No further processing with mk_origtargz ...
gbp:error: Couldn't find tarball at '../gcc-arm-none-eabi-8-2019-q3-update-src.tar.bz2?revision=94f1f227-7a58-49c6-910d-147d82b5a863?product=GNU Arm Embedded Toolchain,Invariant,,Source,8-2019-q3-update'

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