Change informational log from stderr to stdout

[Yay295]

woff2/src/woff2_enc.cc

Lines 286 to 289 in 0f4d304

	#ifdef FONT_COMPRESSION_BIN
	fprintf(stderr, "Compressed %zu to %u.\n", total_transform_length,
	total_compressed_length);
	#endif

This message isn't an error, so it should be printed to stdout instead of stderr.

creating this issue because #83 was closed