perf tools: Add '\n' at the end of parse-options error messages

Few error messages does not have '\n' at the end and thus next prompt
gets printed in the same line. Ex,

  linux~$ perf buildid-cache -verbose --add ./a.out
   Error: did you mean `--verbose` (with two dashes ?)linux~$

Fix it.
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Krister Johansen <kjlx@templeofstupid.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Sihyeon Jang <uneedsihyeon@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20180417041346.5617-2-ravi.bangoria@linux.vnet.ibm.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/lib/subcmd/parse-options.c

@@ -433,7 +433,7 @@ static int parse_long_opt(struct parse_opt_ctx_t *p, const char *arg,
 
 	if (ambiguous_option) {
 		 fprintf(stderr,
-			 " Error: Ambiguous option: %s (could be --%s%s or --%s%s)",
+			 " Error: Ambiguous option: %s (could be --%s%s or --%s%s)\n",
 			 arg,
 			 (ambiguous_flags & OPT_UNSET) ?  "no-" : "",
 			 ambiguous_option->long_name,
@@ -458,7 +458,7 @@ static void check_typos(const char *arg, const struct option *options)
 		return;
 
 	if (strstarts(arg, "no-")) {
-		fprintf(stderr, " Error: did you mean `--%s` (with two dashes ?)", arg);
+		fprintf(stderr, " Error: did you mean `--%s` (with two dashes ?)\n", arg);
 		exit(129);
 	}
 
@@ -466,7 +466,7 @@ static void check_typos(const char *arg, const struct option *options)
 		if (!options->long_name)
 			continue;
 		if (strstarts(options->long_name, arg)) {
-			fprintf(stderr, " Error: did you mean `--%s` (with two dashes ?)", arg);
+			fprintf(stderr, " Error: did you mean `--%s` (with two dashes ?)\n", arg);
 			exit(129);
 		}
 	}