iossim: fix environment mutation
iossim: fix environment mutation

* ensure that the dictionary is mutable
* remove Objective-2.0 code

Change-Id: I30c3966a37ad24dfabfd4bd15b0079d0f1a02efc
Reviewed-by: Eike Ziller <c142da16c73a95a82d35191bcc55b22835617128@digia.com>

Distrotech/qtcreator,maui-packages/qt-creator,martyone/sailfish-qtcreator,amyvmiwei/qt-creator,AltarBeastiful/qt-creator,kuba1/qtcreator,martyone/sailfish-qtcreator,darksylinc/qt-creator,colede/qtcreator,danimo/qt-creator,xianian/qt-creator,colede/qtcreator,kuba1/qtcreator,danimo/qt-creator,amyvmiwei/qt-creator,Distrotech/qtcreator,danimo/qt-creator,darksylinc/qt-creator,Distrotech/qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,kuba1/qtcreator,farseerri/git_code,darksylinc/qt-creator,richardmg/qtcreator,omniacreator/qtcreator,maui-packages/qt-creator,darksylinc/qt-creator,omniacreator/qtcreator,maui-packages/qt-creator,AltarBeastiful/qt-creator,farseerri/git_code,martyone/sailfish-qtcreator,danimo/qt-creator,Distrotech/qtcreator,farseerri/git_code,farseerri/git_code,richardmg/qtcreator,maui-packages/qt-creator,amyvmiwei/qt-creator,farseerri/git_code,AltarBeastiful/qt-creator,AltarBeastiful/qt-creator,kuba1/qtcreator,richardmg/qtcreator,Distrotech/qtcreator,omniacreator/qtcreator,richardmg/qtcreator,darksylinc/qt-creator,danimo/qt-creator,AltarBeastiful/qt-creator,colede/qtcreator,omniacreator/qtcreator,omniacreator/qtcreator,farseerri/git_code,darksylinc/qt-creator,darksylinc/qt-creator,farseerri/git_code,martyone/sailfish-qtcreator,xianian/qt-creator,colede/qtcreator,amyvmiwei/qt-creator,amyvmiwei/qt-creator,xianian/qt-creator,richardmg/qtcreator,farseerri/git_code,xianian/qt-creator,AltarBeastiful/qt-creator,xianian/qt-creator,kuba1/qtcreator,AltarBeastiful/qt-creator,amyvmiwei/qt-creator,kuba1/qtcreator,richardmg/qtcreator,AltarBeastiful/qt-creator,Distrotech/qtcreator,xianian/qt-creator,maui-packages/qt-creator,amyvmiwei/qt-creator,martyone/sailfish-qtcreator,Distrotech/qtcreator,amyvmiwei/qt-creator,martyone/sailfish-qtcreator,danimo/qt-creator,xianian/qt-creator,danimo/qt-creator,maui-packages/qt-creator,kuba1/qtcreator,colede/qtcreator,danimo/qt-creator,colede/qtcreator,omniacreator/qtcreator,maui-packages/qt-creator,colede/qtcreator,danimo/qt-creator,xianian/qt-creator,omniacreator/qtcreator,richardmg/qtcreator,martyone/sailfish-qtcreator,kuba1/qtcreator,kuba1/qtcreator,darksylinc/qt-creator,martyone/sailfish-qtcreator