apache2: create configuration file for systemd-tmpfiles

  (original commit: a40fcab604554d0e549294458b27b25e5639fceb)

when use systemd as a system and service manager, systemd-tmpfiles will replace
/etc/init.d/populate-volatile.sh to handle temporary files, so we need to create
the configuration file for apache2

Signed-off-by: Roy Li <rongqing.li@windriver.com>
apache2: add apxs to SSTATE_SCAN_FILES

  (original commit: 4ddfb3e92fdcffccfcbae1b4003a5d7c3385a637)

apxs is installed under /usr/bin/crossscripts of sysroot, its hardcode paths
should be handled when store or extracts the sstate archives.

Signed-off-by: Roy Li <rongqing.li@windriver.com>