phosphor-logging: srcrev bump 18f4b6e8d0..f6126a78ac

Andrew Geissler (9):
      gitignore: ensure test files not ignored
      invalid-address: ensure bad path is invalid
      boot-block: check quiesce on error setting
      boot-block: look for a callout in the entry
      boot-block: create d-bus block object on callout
      boot-block: remove blocking error on erase
      boot-block: create blocking association
      boot-block: clear block on error resolve
      boot-block: quiesce host on error

(From meta-phosphor rev: a0fd25d2cc43c1d0eca989ec778ffa75d92f1ca9)

Change-Id: I8c55e30ab225ba028918db4bdaacfc3362a42af8
Signed-off-by: Andrew Geissler <openbmcbump-github@yahoo.com>
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>