Android options: Stronger check for valid JDK location
Android options: Stronger check for valid JDK location

The location should contain bin/javac

Change-Id: If67ed4902b817f2d07302afb195e6dfbad881250
Reviewed-by: Daniel Teske <d8a411aec9a206efedb4d45b75fe8d13f1e2b628@digia.com>

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