Linux: Build fails at luajit if /tmp is mounted with noexec

[BigBigos]

Title: Linux: Build fails at luajit if /tmp is mounted with noexec

Description:
It seems that envoy-1.16.0 fails to build on RHEL7 because /tmp is mounted with noexec option. It's possible that this is caused by the fix to issue 6188, which has changed the temporary directory from bazel cache to /tmp.
Remounting /tmp with exec option (including /var/tmp as /tmp is just a bind-mount to /var/tmp) fixes this issue for me.

Repro steps:
Setup RHEL7 to build Envoy (including setting up devtoolset-9 with GCC 9)
scl enable devtoolset-9 bazel build //source/exe:envoy-static --copt=-DENVOY_IGNORE_GLIBCXX_USE_CXX11_ABI_ERROR=1

Output tail:

host/minilua ../dynasm/dynasm.lua   -D ENDIAN_LE -D P64 -D JIT -D FFI -D FPU -D HFABI -D VER= -o host/buildvm_arch.h vm_x64.dasc
make[1]: execvp: host/minilua: Permission denied
make[1]: *** [host/buildvm_arch.h] Error 127
make[1]: *** Waiting for unfinished jobs....
make[1]: Leaving directory `/tmp/tmp.WOaDZvfeW7/com_github_luajit_luajit/src'
make: *** [src/luajit] Error 2
cp: cannot stat '/tmp/tmp.WOaDZvfeW7/luajit': No such file or directory

_____ END BUILD LOGS _____

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This issue has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in the next 7 days unless it is tagged "help wanted" or "no stalebot" or other activity occurs. Thank you for your contributions.

[github-actions]

This issue has been automatically closed because it has not had activity in the last 37 days. If this issue is still valid, please ping a maintainer and ask them to label it as "help wanted" or "no stalebot". Thank you for your contributions.