Add a gzip'ed svgDoc to SampleSVG.ttf

The OT-SVG specification allows individual svgDoc inside the SVG table
to be optionaly gzip'ed. Add a glyph to SampleSVG.ttf which uses a
compressed svgDoc so that this can be tested.

This font crashes vanilla FreeType 2.12.0 and 2.12.1. This issue was
fixed with [0] and backported to Debian in 2.12.1+dfsg-3 [1].

[0] c26872ed59
[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1013094

Change-Id: I45e115a743b8aa4d545f34c9668597d22e0a2bf4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/545779
Commit-Queue: Ben Wagner <bungeman@google.com>
Reviewed-by: Herb Derby <herb@google.com>

gm/scaledemoji_rendering.cpp

@@ -43,7 +43,7 @@ protected:
         { Test::Source::Resource, "fonts/sbix.ttf"     , sampleText  },
         { Test::Source::Resource, "fonts/cbdt.ttf"     , sampleText  },
         { Test::Source::Portable, "Emoji"              , sampleText  },
-        { Test::Source::Resource, "fonts/SampleSVG.ttf", "abcdefghi" },
+        { Test::Source::Resource, "fonts/SampleSVG.ttf", "abcdefghij" },
     };
     sk_sp<SkTypeface> typefaces[std::size(tests)];
     void onOnceBeforeDraw() override {