Capitalize namespacing structs

This helps to avoid name clashes when breaking up modules into packages.

src/fontgen/fontgen.c

@@ -103,7 +103,7 @@ static void generate(const char * d_file_name)
     fprintf(fh, "    int baseline_offset;\n");
     fprintf(fh, "    const CharInfo[] chars;\n");
     fprintf(fh, "};\n");
-    fprintf(fh, "__gshared const FontInfo kfont = {\n");
+    fprintf(fh, "__gshared const FontInfo Kfont = {\n");
     fprintf(fh, "    %du,\n", line_height);
     fprintf(fh, "    %du,\n", max_advance);
     fprintf(fh, "    %d,\n", baseline_offset);