libcap: Update to version 2.70

libcap: Update to version 2.70

- Update from version 2.69 to 2.70
- Update of rootfile
- sobump means following core packages need to be shipped
   arping
   cdrkit
   iproute2
   iputils
   ntp
   squid
   udev
  and the following addons will be shipped with the pak_ver increments in the other
   patches that are part ofg this set
   avahi
   bacula
   cifs-utils
   dnsdist
   freeradius
   frr
   htop
   nfs
   rng-tools
   samba
   tor
   tshark
   vdr
   wavemon
- Changelog
   2.70
	setcap changes to make it harder to set invalid file capabilities (Bug 217592\
	 reported by parke.nexus)
	Lots of documentation fixes (contributions from Jakub Wilk and
	 Carlos Rodriguez-Fernandez)
	Fix c89 compilation syntax for the C code in the libraries.
	libpam has deprecated providing the _pam_overwrite() function, so use memset()
	 instead

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>