Don't split dwarf debug for a fully-reproducible build

Bug: https://github.com/rust-lang/rust/issues/34902

Gbp-Pq: Name u-reproducible-build.patch

u-backtrace-373

Bug: https://github.com/rust-lang/rust/issues/77410

Gbp-Pq: Name u-backtrace-373.patch

rustc (1.47.0+dfsg1-1) unstable; urgency=medium

  * New upstream release.
  * Update to LLVM 11.
  * Ignore more tests on big-endian.

[dgit import unpatched rustc 1.47.0+dfsg1-1]

Import rustc_1.47.0+dfsg1.orig.tar.xz

[dgit import orig rustc_1.47.0+dfsg1.orig.tar.xz]

Import rustc_1.47.0+dfsg1-1.debian.tar.xz

[dgit import tarball rustc 1.47.0+dfsg1-1 rustc_1.47.0+dfsg1-1.debian.tar.xz]