[Bug bootstrap/78220] New: Add 'remounting exec' suggestion

["tulipawn at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78220

            Bug ID: 78220
           Summary: Add 'remounting exec' suggestion
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tulipawn at gmail dot com
  Target Milestone: ---

Restarting a build on a `noexec` partition fails with:

checking whether the C compiler works... configure: error: in
`/mnt/gcc-svn-master/build-lto/gcc':
configure: error: cannot run C compiled programs.
If you meant to cross compile, use `--host'.

The above suggestion could include the most obvious, i.e. exec permissions, for
example: 

"Check if the partition hasn't been (re)mounted noexec."