efivar: backport 5 patches to fix build with gold

efivar: backport 5 patches to fix build with gold

* LDFLAGS += "-fuse-ld=bfd" in the recipe doesn't work and
  it still fails to build with ld-is-gold in DISTRO_FEATURES

  removal of this line sent to master in:
  https://lists.openembedded.org/g/openembedded-core/message/185167

* the most important ones are the 1st which removes --add-needed
  and the last which removes src/include/workarounds.mk completely
  while 2-4 patches just update src/include/workarounds.mk for the
  last one to apply cleanly

* alternatively we can bump SRCREV to latest 38 as master did in:
  https://git.openembedded.org/openembedded-core/commit/?id=4df808c616f847d90203582fd950a49bb8360dd0
  which brings 23 commits, but instead of adding 5 more patches
  allows to remove 5

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>