Specify android platform setting by qmake

[stereomatching]

qmake support something like win32 and mac, it is quite different to
specify some platform specific setting

@win32{

DEFINES += WIN_OS

INCLUDEPATH += ../../../3rdLibs/openCV/OpenCV-2.4.5/build/include

LIBS += -L../../../3rdLibs/openCV/OpenCV-2.4.5/builded/bin -lopencv_core245
LIBS += -L../../../3rdLibs/openCV/OpenCV-2.4.5/builded/bin -lopencv_imgproc245
}
mac{

CONFIG -= app_bundle
CONFIG += qwt

DEFINES += MAC_OS

INCLUDEPATH += /usr/local/include

LIBS += -L/usr/local/lib/ -lopencv_core.2.4.5
LIBS += -L/usr/local/lib/ -lopencv_imgproc.2.4.5
}@

do qmake support something like

@android{
//.....
}@

or better

@android_armeabi{
}

android_armeabi_v7a{
}@