libptytty: disable utmp/wtmp to fix a musl failure

package/libptytty/Makefile

@@ -21,7 +21,8 @@ $(eval $(call PKG_template,LIBPTYTTY,libptytty,$(PKG_VERSION)-$(PKG_RELEASE),$(P
 TARGET_CFLAGS+=		-lstdc++
 CONFIG_STYLE:=		cmake
 CMAKE_FLAGS+=		-DTTY_GID_SUPPORT_EXITCODE=0 \
-			-DTTY_GID_SUPPORT_EXITCODE__TRYRUN_OUTPUT=0
+			-DUTMP_SUPPORT=0 \
+			-DWTMP_SUPPORT=0 \
 XAKE_FLAGS+=		VERBOSE=1
 
 libptytty-install: