Fix flaky test

This test font had a upem of 769, which results in rounding-related errors with
the FreeType font funcs.  Change the upem to 1024 to fix that.

Fixes https://github.com/behdad/harfbuzz/issues/201

test/shaping/fonts/sha1sum/MANIFEST

@@ -4,6 +4,7 @@
 1a6f1687b7a221f9f2c834b0b360d3c8463b6daf.ttf
 1c04a16f32a39c26c851b7fc014d2e8d298ba2b8.ttf
 1c2c3fc37b2d4c3cb2ef726c6cdaaabd4b7f3eb9.ttf
+1c2fb74c1b2aa173262734c1f616148f1648cfd6.ttf
 226bc2deab3846f1a682085f70c67d0421014144.ttf
 270b89df543a7e48e206a2d830c0e10e5265c630.ttf
 298c9e1d955f10f6f72c6915c3c6ff9bf9695cec.ttf
@@ -30,7 +31,6 @@ b9e2aaa0d75fcef6971ec3a96d806ba4a6b31fe2.ttf
 bb29ce50df2bdba2d10726427c6b7609bf460e04.ttf
 bb9473d2403488714043bcfb946c9f78b86ad627.ttf
 c4e48b0886ef460f532fb49f00047ec92c432ec0.ttf
-c78d1f25ea1df1210414f2fe2e0e1e53082bba76.ttf
 d629e7fedc0b350222d7987345fe61613fa3929a.ttf
 df768b9c257e0c9c35786c47cae15c46571d56be.ttf
 e207635780b42f898d58654b65098763e340f5c7.ttf