hostapd: Fix some manual page formatting

lintian (Debian package lint tool) found some small deficiencies in
hostapd.8 and hostapd_cli.1.

hostapd/hostapd.8

@@ -3,7 +3,7 @@
 hostapd \- IEEE 802.11 AP, IEEE 802.1X/WPA/WPA2/EAP/RADIUS Authenticator
 .SH SYNOPSIS
 .B hostapd
-[-hdBKtv] [-P <PID file>] <configuration file(s)>
+[\-hdBKtv] [\-P <PID file>] <configuration file(s)>
 .SH DESCRIPTION
 This manual page documents briefly the
 .B hostapd

hostapd/hostapd_cli.1

@@ -3,7 +3,7 @@
 hostapd_cli \- hostapd command-line interface
 .SH SYNOPSIS
 .B hostapd_cli
-[-p<path>] [-i<ifname>] [-hv] [command..]
+[\-p<path>] [\-i<ifname>] [\-hv] [command..]
 .SH DESCRIPTION
 This manual page documents briefly the
 .B hostapd_cli