Whitelist is missing a system call used by gold

[edunham]

Running the demo from the front page of the site in the playpen with rust nightly gives

error: linking with `cc` failed: exit code: 1
note: "cc" "-Wl,--as-needed" "-m64" "-L" "/usr/lib64/rustlib/x86_64-unknown-linux-gnu/lib" "./out.0.o" "-o" "./out" "-Wl,--gc-sections" "-pie" "-nodefaultlibs" "-L" "/usr/lib64/rustlib/x86_64-unknown-linux-gnu/lib" "-Wl,-Bstatic" "-Wl,-Bdynamic" "/usr/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd-17a8ccbd.rlib" "/usr/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcollections-17a8ccbd.rlib" "/usr/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_unicode-17a8ccbd.rlib" "/usr/lib/rustlib/x86_64-unknown-linux-gnu/lib/librand-17a8ccbd.rlib" "/usr/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc-17a8ccbd.rlib" "/usr/lib/rustlib/x86_64-unknown-linux-gnu/lib/liballoc_jemalloc-17a8ccbd.rlib" "/usr/lib/rustlib/x86_64-unknown-linux-gnu/lib/liblibc-17a8ccbd.rlib" "/usr/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcore-17a8ccbd.rlib" "-l" "dl" "-l" "pthread" "-l" "gcc_s" "-l" "pthread" "-l" "c" "-l" "m" "-l" "rt" "-fuse-ld=gold" "-l" "compiler-rt"
note: collect2: fatal error: ld terminated with signal 31 [Bad system call]
compilation terminated.

error: aborting due to previous error
playpen: application terminated with error code 101

Compilation failed.

[ghost]

Duplicate of #165.

[edunham]

Oops, closing as duplicate