Recommended update for efivar

This update for efivar fixes the following issues:

- fix logic that checks for UCS-2 string termination (bsc#1127544)
- fix casting of IPv4 addresses
- Don't require an EUI for NVMe (bsc#1100077)
- Add support for ACPI Generic Container and Embedded Controller root nodes (bsc#1101023)
- fix for compilation failures bsc#1120862

This update was imported from the SUSE:SLE-15-SP1:Update update project.

Fixed bugs
bnc#1120862
GCC 9: efivar build fails
bnc#1127544
efibootmgr is broken
bnc#1101023
In openQA 'grub2' test fails for aarch64 ISO (DVD+NET) because UEFI bootloader does not find openSUSE from HDD
bnc#1100077
[Build 20180702] NVME@Uefi: could not prepare boot variable
Selected Binaries
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