[unittests] Test smcp output instead of coverage
[unittests] Test smcp output instead of coverage

Now the test 1) makes the user specify a requirements file and 2)
requires that the file contain not only input code points but also
names of the expected output glyphs.

dougfelt/nototools,googlefonts/nototools,moyogo/nototools,googlei18n/nototools,googlefonts/nototools,moyogo/nototools,googlei18n/nototools,googlefonts/nototools,googlefonts/nototools,anthrotype/nototools,anthrotype/nototools,googlefonts/nototools,googlei18n/nototools,anthrotype/nototools,moyogo/nototools,dougfelt/nototools,dougfelt/nototools