qt54: set documentation path in setupHook

pkgs/development/libraries/qt-5/5.4/setup-hook.sh

@@ -38,6 +38,13 @@ addQtModule() {
                 QML2_IMPORT_PATH="$QML2_IMPORT_PATH${QML2_IMPORT_PATH:+:}$1/lib/qt5/qml";
             fi
         fi
+
+        if [[ -d "$1/share" ]]; then
+            @lndir@/bin/lndir -silent "$1/share" "$qtOut/share"
+            if [[ -n $qtSubmodule ]]; then
+                find "$1/share" -printf 'share/%P\n' >> "$qtOut/nix-support/qt-inputs"
+            fi
+        fi
     fi
 }
 
@@ -61,6 +68,7 @@ Prefix = $qtOut
 Plugins = lib/qt5/plugins
 Imports = lib/qt5/imports
 Qml2Imports = lib/qt5/qml
+Documentation = share/doc/qt5
 EOF
 export QMAKE="$qtOut/bin/qmake"