hosted/jlink: Avoid stripping the copyright string located after a nu…

…l byte

* According to Wireshark usbmon dumps, the firmware returns 112 bytes of version,
  including some copyright information after an effectively NUL-terminator.
* Use strchr() instead of index() for Windows reasons.

src/platforms/hosted/jlink.c

@@ -295,10 +295,15 @@ static bool jlink_get_version(void)
 	if (version_length > sizeof(jlink.fw_version))
 		return false;
 
-	/* Read vesion string directly into jlink.version */
+	/* Read version string directly into jlink.version */
 	bmda_usb_transfer(bmda_probe_info.usb_link, NULL, 0, jlink.fw_version, version_length, JLINK_USB_TIMEOUT);
 	jlink.fw_version[version_length - 1U] = '\0'; /* Ensure null termination */
 
+	/* Replace first NUL separating platform and copyright string */
+	char *firstnul = strchr(jlink.fw_version, 0);
+	if (firstnul != NULL)
+		*firstnul = '\n';
+
 	DEBUG_INFO("Firmware version: %s\n", jlink.fw_version);
 
 	/* Read the hardware version if supported */