Rollup merge of rust-lang#62949 - mati865:patch-1, r=alexcrichton

Re-enable assertions in PPC dist builder

Fixes rust-lang#36150

Log of successful build:
https://dev.azure.com/mati865/6518b167-4cf6-4587-b3d1-8e137f2fb2e4/_apis/build/builds/23/logs/825

src/ci/docker/dist-powerpc-linux/Dockerfile

@@ -36,7 +36,3 @@ ENV HOSTS=powerpc-unknown-linux-gnu
 
 ENV RUST_CONFIGURE_ARGS --enable-extended --disable-docs
 ENV SCRIPT python2.7 ../x.py dist --host $HOSTS --target $HOSTS
-
-# FIXME(#36150) this will fail the bootstrap. Probably means something bad is
-#               happening!
-ENV NO_LLVM_ASSERTIONS 1