iox-#14 update changelog

Signed-off-by: Mathias Kraus <[email protected]>

CHANGELOG.md

@@ -54,6 +54,12 @@ See [Eclipse iceoryx 1.0.0 (Almond)](https://projects.eclipse.org/projects/techn
 - iceoryx libs should be build as static libs [\#509](https://github.com/eclipse-iceoryx/iceoryx/issues/509)
 - Build with gcov is broken [\#497](https://github.com/eclipse-iceoryx/iceoryx/issues/497)
 
+## [v0.99.x](https://github.com/eclipse-iceoryx/iceoryx/tree/v0.99.x) (2021-04-xx)
+
+[Full Changelog](https://github.com/eclipse-iceoryx/iceoryx/compare/v0.99.6...v0.99.x)
+
+- cleanup testing libraries; if used outside of iceoryx, include paths and link targets must be adjusted
+
 ## [v0.99.6](https://github.com/eclipse-iceoryx/iceoryx/tree/v0.99.6) (2021-04-08)
 
 [Full Changelog](https://github.com/eclipse-iceoryx/iceoryx/compare/v0.99.5...v0.99.6)