Rebase to NSS 3.15
    
    - Remove three patches obsolted by the rebase and updated two
    - Temporarily not building the ecperf tool
    - ecperef requires freebl/ec.h and ecl-curve.h and the latter
    - causes compile failure because it requires that
    - NSS_ECC_MORE_THAN_SUITE_B not be defined yet this is
    - required for nss builds to allow external pkcs #11 providers
    - to support curves beyond suite-b, such restriction only applies
    - to the internal crypto module