Fold in older changelogs

projects/tor-browser/Bundle-Data/Docs/ChangeLog.txt

+Tor Browser 8.0a8 -- June 10 2018
+ * All platforms
+   * Update Firefox to 52.8.1esr
+   * Bug 26098: Remove amazon-meek
+
+Tor Browser 7.5.5 -- June 10 2018
+ * All platforms
+   * Update Firefox to 52.8.1esr
+   * Bug 26098: Remove amazon-meek
+
 Tor Browser 8.0a7 -- May 9 2018
  * All platforms
    * Update Firefox to 52.8.0esr
@@ -14,6 +24,17 @@ Tor Browser 8.0a7 -- May 9 2018
  * Linux
    * Bug 26010: Change Snowflake rendezvous to use the Azure domain front
 
+Tor Browser 7.5.4 -- May 9 2018
+ * All platforms
+   * Update Firefox to 52.8.0esr
+   * Update HTTPS Everywhere to 2018.4.11
+   * Update NoScript to 5.1.8.5
+   * Bug 23439: Exempt .onion domains from mixed content warnings
+   * Bug 22614: Make e10s/non-e10s Tor Browsers indistinguishable
+   * Bug 22659: Changes to `intl.accept.languages` get overwritten after restart
+   * Bug 25973: Backport off-by-one fix (bug 1352073)
+   * Bug 25020: Add a tbb_version.json file
+
 Tor Browser 8.0a6 -- April 19 2018
  * All platforms
    * Update Tor to 0.3.3.5-rc