Avoid make compatibility mode issues with creating cookies from r287844 and r287848.

Also hide the cookie creation.

Suggested by:	imp, Daniel O'Connor

include/Makefile

@@ -166,7 +166,7 @@ compat:
 	    -f ${.CURDIR}/../etc/mtree/BSD.include.dist \
 	    -p ${DESTDIR}${INCLUDEDIR} > /dev/null
 .if ${MK_META_MODE} == "yes"
-	touch ${.TARGET}
+	@touch ${.TARGET}
 .endif
 
 copies:
@@ -255,8 +255,7 @@ copies:
 	${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 teken.h \
 	    ${DESTDIR}${INCLUDEDIR}/teken
 .if ${MK_META_MODE} == "yes"
-	cd ${.OBJDIR}
-	touch ${.TARGET}
+	@touch ${.OBJDIR}/${.TARGET}
 .endif
 
 symlinks:
@@ -373,8 +372,7 @@ symlinks:
 		    ${DESTDIR}${INCLUDEDIR}/rpc; \
 	done
 .if ${MK_META_MODE} == "yes"
-	cd ${.OBJDIR}
-	touch ${.TARGET}
+	touch ${.OBJDIR}/${.TARGET}
 .endif
 
 .if ${MACHINE} == "host"