Rename nettrace3gpp324423 to 3gpp32423

Use "3gpp32423" instead of "nettrace3gpp324423":
- There were too many "4"s in the previous name ("324423" vs "32423").
- "nettrace" isn't an official name, per 3GPP TS 32 423
- It's shorter.

Change-Id: Ic981d0351a3014fb79702955ebef7b13f6ce4a2e
Reviewed-on: https://code.wireshark.org/review/9863
Reviewed-by: Anders Broman <a.broman58@gmail.com>

wiretap/file_access.c

@@ -1609,7 +1609,7 @@ static const struct file_type_subtype_info dump_open_table_base[] = {
 	  nstrace_35_dump_can_write_encap, nstrace_dump_open, NULL },
 
 	/* WTAP_FILE_TYPE_SUBTYPE_NETTRACE_3GPP_32_423 */
-	{ "3GPP TS 32.423 Trace", "nettrace3gpp324423", NULL, NULL,
+	{ "3GPP TS 32.423 Trace", "3gpp32423", NULL, NULL,
 	  FALSE, FALSE, 0,
 	  NULL, NULL, NULL },
 };