Fix WITHOUT_EXAMPLES build:

While removing unnecessary entries from .PATH.c I missed that for the
examples WPA_SUPPLICANT_DISTDIR/HOSTAPD_DISTDIR is explicitly added to
.PATH.

Tested by:	lev
MFC after:	2 weeks

usr.sbin/wpa/hostapd/Makefile

@@ -2,7 +2,8 @@
 
 .include "${.CURDIR}/../Makefile.inc"
 
-.PATH.c:${WPA_DISTDIR}/src/drivers
+.PATH.c:${HOSTAPD_DISTDIR} \
+	${WPA_DISTDIR}/src/drivers
 
 PROG=	hostapd
 SRCS=	accounting.c \

usr.sbin/wpa/wpa_supplicant/Makefile

@@ -2,7 +2,8 @@
 
 .include "${.CURDIR}/../Makefile.inc"
 
-.PATH.c:${WPA_DISTDIR}/src/drivers
+.PATH.c:${WPA_SUPPLICANT_DISTDIR} \
+	${WPA_DISTDIR}/src/drivers
 
 PROG=	wpa_supplicant
 SRCS=	aes-unwrap.c \