[Issue 18658] Provide GNUmake for easier development setup

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18658

Walter Bright <bugzilla at digitalmars.com> changed:

           What    |Removed                     |Added
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           Keywords|                            |TestSuite
                 CC|                            |bugzilla at digitalmars.com

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