Fix build on Unix.
Fix build on Unix.

sleep(3) is defined on unistd.h, so you need to include it.

/home/thiago/src/qt/creator/src/plugins/android/androidconfigurations.cpp(556): error: identifier "sleep" is undefined

Change-Id: I71c76bd7f085240d9e3ceaad1ac062387cf7c838
Reviewed-by: Daniel Teske <d8a411aec9a206efedb4d45b75fe8d13f1e2b628@nokia.com>

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