[Issue 11997] rdmd should search its binary path for the compiler

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=11997

--- Comment #6 from github-bugzilla at puremagic.com ---
Commit pushed to master at https://github.com/dlang/tools

https://github.com/dlang/tools/commit/2e516ab51a5d1c0329312aa56960281c95e57a33
rdmd: Append binExt to the compiler path to check from the same directory

Fixes using the compiler from rdmd's directory (issue 11997) on
Windows.

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