package/efivar: bump version to 35
Fixes:
http://autobuild.buildroot.net/results/545/545013d3977b3eddd27ca0fc21cc1248f3bb0dbb/
http://autobuild.buildroot.net/results/695/6952b99eb0b0e85b2f5408accdca2b4dd17d14c0/
Includes a workaround for -Werror=stringop-overflow= erroring out on strncpy
on some toolchains:
https://github.com/rhboot/efivar/commit/7461d47cddf1cb27b1aeb646e1cdc9f7ecc6219a
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>