Don't flood build directory with object files

gistfile1.pro

android:{
    ARCH=android_arm
} else {
    !contains(QMAKE_TARGET.arch, x86_64) {
    ARCH=x32
    } else {
    ARCH=x64
    }
}
static: {
LINKTYPE=static
} else {
LINKTYPE=dynamic
}
debug: BUILDTP=debug
release: BUILDTP=release
OBJECTS_DIR = $$DESTDIR/_build_$$ARCH/$$TARGET/_$$BUILDTP/.obj
MOC_DIR     = $$DESTDIR/_build_$$ARCH/$$TARGET/_$$BUILDTP/.moc
RCC_DIR     = $$DESTDIR/_build_$$ARCH/$$TARGET/_$$BUILDTP/.rcc
UI_DIR      = $$DESTDIR/_build_$$ARCH/$$TARGET/_$$BUILDTP/.ui
message("$$TARGET will be built as $$BUILDTP $$ARCH ($$QMAKE_TARGET.arch) $${LINKTYPE}ally in $$OBJECTS_DIR")