[PATCH] bootstrap: Disable initial-exec TLS model on powerpc

Fixes #81334.

Gbp-Pq: Name u-85807.patch

rustc (1.50.0+dfsg1-1) unstable; urgency=medium

  * Upload to unstable.

[dgit import unpatched rustc 1.50.0+dfsg1-1]

Import rustc_1.50.0+dfsg1-1.debian.tar.xz

[dgit import tarball rustc 1.50.0+dfsg1-1 rustc_1.50.0+dfsg1-1.debian.tar.xz]

Import rustc_1.50.0+dfsg1.orig.tar.xz

[dgit import orig rustc_1.50.0+dfsg1.orig.tar.xz]