Security update for kdump

This update for kdump provides several fixes and enhancements:

- Refresh kdumprd if /etc/hosts or /etc/nsswitch.conf is changed. (bsc#943214)
- Add a separate systemd service to rebuild kdumprd at boot. (bsc#943214)
- Improve network setup in the kdump environment by reading configuration from wicked
by default (system configuration files are used as a fallback). (bsc#980328)
- Use the last mount entry in kdump_get_mountpoints(). (bsc#951844)
- Remove 'notsc' from the kdump kernel command line. (bsc#973213)
- Handle dump files with many program headers. (bsc#932339, bsc#970708)
- Fall back to stat() if file type is DT_UNKNOWN. (bsc#964206)
- Remove vm. sysctls from kdump initrd. (bsc#927451, bsc#987862)
- Use the exit code of kexec, not that of "local". (bsc#984799)
- Convert sysroot to a bind mount in kdump initrd. (bsc#976864)
- Distinguish between Xenlinux (aka Xenified or SUSE) and pvops Xen kernels, as the
latter can run on bare metal. (bsc#974270)
- CVE-2016-5759: Use full path to dracut as argument to bash. (bsc#989972, bsc#990200)

This update was imported from the SUSE:SLE-12-SP1:Update update project.

Fixed bugs
bnc#980328
kdump does not setup vlan interface properly
bnc#989972
mkdumprd -f fails if as find and execute dracut fails
bnc#990200
CVE-2016-5759: kdump: mkdumprd calls script in current working directory
bnc#951844
SLES12SP1 RC2 system boots to emergency mode
bnc#973213
kdump looping in BogoMIPS stage with "notsc" kernel option.
bnc#970708
With 2TB memory installed on the system, kdumptool fails to collect the vmcore
bnc#964206
KDUMP_KEEP_OLD_DUMPS limit not enforced
bnc#927451
crashdump fails to capture dump (Out of memory on fresh boot when testing....)
bnc#987862
unable to capture a kernel dump when sysctl vm.nr_hugepages have been set
bnc#974270
kdumptool fails to load kernel-default
bnc#943214
autoyast: kdump is not properly setup on network locations
bnc#932339
kdump does not work on large memory system
bnc#984799
Kdump service exit status shows SUCCESS even if it fails to load
bnc#976864
[Alpha3 Build1433] kdump doesn't work
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