Log Message:
Update to 38.7.0

Changelog:
Fixed in Firefox ESR 38.7
    2016-37 Font vulnerabilities in the Graphite 2 library
    2016-35 Buffer overflow during ASN.1 decoding in NSS
    2016-34 Out-of-bounds read in HTML parser following a failed allocation
    2016-31 Memory corruption with malicious NPAPI plugin
    2016-28 Addressbar spoofing though history navigation and Location protocol \ 
property
    2016-27 Use-after-free during XML transformations
    2016-25 Use-after-free when using multiple WebRTC data channels
    2016-24 Use-after-free in SetBody
    2016-23 Use-after-free in HTML5 string parser
    2016-21 Displayed page address can be overridden
    2016-20 Memory leak in libstagefright when deleting an array during MP4 \ 
processing
    2016-17 Local file overwriting and potential privilege escalation through \ 
CSP reports
    2016-16 Miscellaneous memory safety hazards (rv:45.0 / rv:38.7)
    2015-136 Same-origin policy violation using performance.getEntries and \ 
history navigation
    2015-81 Use-after-free in MediaStream playback