rename ENABLE_UNIT_TESTS to ENABLE_XCINT_UNIT_TESTS
rename ENABLE_UNIT_TESTS to ENABLE_XCINT_UNIT_TESTS

bast/xcint,robertodr/xcint,bast/xcint,bast/xcint,robertodr/xcint,robertodr/xcint,dftlibs/xcint,dftlibs/xcint,dftlibs/xcint