Unreviewed. Add missing inspector files to compilation.

* PlatformGTK.cmake: Add javascript sources in
WebInspectorUI/UserInterface/External/Esprima to the list of
inspector files.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@174316 268f45cc-cd09-0410-ab3c-d52691b4dbfc
[jhbuild] Simplify platform detection in update-webkit-libs-jhbuild
https://bugs.webkit.org/show_bug.cgi?id=137390

Reviewed by Carlos Garcia Campos.

* Scripts/update-webkit-libs-jhbuild:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@174317 268f45cc-cd09-0410-ab3c-d52691b4dbfc