doc: updated changelog and credits.

doc/changelog.dox

@@ -632,6 +632,12 @@ See also:
     @ref Trade library that use @ref std::string stopped compiling on MSVC as
     there was no remaining transitive @cpp #include <string> @ce left (see
     [mosra/magnum#556](https://github.com/mosra/magnum/pull/556))
+-   Changed handling of `CMAKE_*_OUTPUT_DIRECTORY` to make plugins pick it up
+    also if only e.g. `CMAKE_RUNTIME_OUTPUT_DIRECTORY` is set, but not
+    `ARCHIVE` or `LIBRARY_OUTPUT_DIRECTORY`. Similarly it now also handles
+    config-specific `CMAKE_*_OUTPUT_DIRECTORY_<CONFIG>` variables. See
+    [mosra/magnum#486](https://github.com/mosra/magnum/issues/486) and
+    [mosra/magnum#570](https://github.com/mosra/magnum/pull/570).
 
 @subsection changelog-latest-bugfixes Bug fixes
 

doc/credits.dox

@@ -146,6 +146,8 @@ Are the below lists missing your name or something's wrong?
     improvements to Debian package building experience
 -   **Hilario Pérez Corona** ([\@hpcorona](https://github.com/hpcorona)) ---
     improvements to @cb{.cmake} android_create_apk() @ce
+-   **Hugo Amnov** ([\@hugoam](https://github.com/hugoam)) --- buildsystem
+    improvements
 -   **Ivan P.** ([\@uzername](https://github.com/uzername)) --- documentation
     improvements
 -   **Ivan Sanz Carasa** ([\@isc30](https://github.com/isc30)) --- buildsystem