GP-4392: Parse l and h ANSI CSI commands for gdb/ConPty.

Ghidra/Framework/Pty/src/main/java/ghidra/pty/windows/AnsiBufferedInputStream.java

@@ -270,6 +270,14 @@ public class AnsiBufferedInputStream extends InputStream {
 				execSetGraphicsRendition();
 				mode = Mode.CHARS;
 				break;
+			case 'h':
+				execPrivateSequence(true);
+				mode = Mode.CHARS;
+				break;
+			case 'l':
+				execPrivateSequence(false);
+				mode = Mode.CHARS;
+				break;
 		}
 	}
 
@@ -473,4 +481,9 @@ public class AnsiBufferedInputStream extends InputStream {
 		// TODO: Maybe a callback. Otherwise, don't care
 		titleBuf.clear();
 	}
+
+	protected void execPrivateSequence(boolean enable) {
+		// These don't matter for input buffering.
+		escBuf.clear();
+	}
 }