Fixes neighbor solicit issue in ubuntu/Centos

    In linux_pull_outer_headers(), ICMP header size was counted twice before skb_pull. this resulted in skb_pull
    failing for the neighbor solicit packets. This bug fixes the same.
    Double committing the fix that's already checked in to the mainline

    Closes-Bug: 1392638

Change-Id: Iaa51b6973aac6a11b89e544151fbf41ac3d3109d