[Bug d/94304] libphobos: Add --with-libdruntime-only configure option

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94304

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2020-03-25
                 CC|                            |marxin at gcc dot gnu.org
     Ever confirmed|0                           |1