Merge branch 'remove-brk' into 'master'

Remove brk

See merge request !59
3 jobs for master in 45 seconds (queued for 1 minute and 8 seconds)
Status Job ID Name Coverage
  Build
passed #29358
build:linux

00:00:24

passed #29359
build:redox

00:00:22

 
  Test
failed #29360
test:redox

00:00:19

 
Name Stage Failure
failed
test:redox Test
For more information about an error, try `rustc --explain E0061`.
error: could not compile `redox_syscall`.

Caused by:
process didn't exit successfully: `rustc --crate-name syscall --edition=2018 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --emit=dep-info,link -Cembed-bitcode=no -C debuginfo=2 --test -C metadata=df2f1505bd9cd277 -C extra-filename=-df2f1505bd9cd277 --out-dir /builds/redox-os/syscall/target/x86_64-unknown-redox/debug/deps --target x86_64-unknown-redox -C linker=x86_64-unknown-redox-gcc -C incremental=/builds/redox-os/syscall/target/x86_64-unknown-redox/debug/incremental -L dependency=/builds/redox-os/syscall/target/x86_64-unknown-redox/debug/deps -L dependency=/builds/redox-os/syscall/target/debug/deps --extern bitflags=/builds/redox-os/syscall/target/x86_64-unknown-redox/debug/deps/libbitflags-a7214a232fa510e7.rlib -L /root/.redoxer/toolchain/x86_64-unknown-redox/lib` (exit code: 1)
warning: build failed, waiting for other jobs to finish...
error: build failed
redoxer cargo: exit code: 101
ERROR: Job failed: exit code 1