public static void writeSlaHeader(OutputStream stream) throws IOException {
		stream.write("sla".getBytes());
		stream.write(FORMAT_VERSION);
	}
Write a .sla file header,including the format version number to the given stream.
@param stream is the given stream
@throws IOException for problems writing to the stream
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/pcode/utils/SlaFormat.java