Tor Browser 10.5.2 release preparations

Version bumps and Changelog update

projects/firefox/config

 # vim: filetype=yaml sw=2
 version: '[% c("abbrev") %]'
 filename: 'firefox-[% c("version") %]-[% c("var/osname") %]-[% c("var/build_id") %]'
-git_hash: 'tor-browser-[% c("var/firefox_version") %]-[% c("var/torbrowser_branch") %]-1-build3'
+git_hash: 'tor-browser-[% c("var/firefox_version") %]-[% c("var/torbrowser_branch") %]-1-build1'
 tag_gpg_id: 1
 git_url: https://git.torproject.org/tor-browser.git
 git_submodule: 1
 gpg_keyring: torbutton.gpg
 
 var:
-  firefox_platform_version: 78.11.0
+  firefox_platform_version: 78.12.0
   firefox_version: '[% c("var/firefox_platform_version") %]esr'
   torbrowser_branch: 10.5
   branding_directory: 'browser/branding/alpha'

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

+Tor Browser 10.5.2 -- July 13 2021
+ * Windows + OS X + Linux
+   * Update Firefox to 78.12.0esr
+   * Bug 40497: Cannot set multiple pages as home pages in 10.5a17 [tor-browser]
+   * Bug 40507: Full update is not downloaded after applying partial update fails [tor-browser]
+   * Bug 40510: open tabs get redirected to about:torconnect on restart [tor-browser]
+
 Tor Browser 10.5.1 -- July 7 2021
  * Android
    * Bug 40324: Change Fenix variant to Release [fenix]

rbm.conf

@@ -57,10 +57,11 @@ buildconf:
   git_signtag_opt: '-s'
 
 var:
-  torbrowser_version: '10.5.1'
+  torbrowser_version: '10.5.2'
   torbrowser_build: 'build1'
   torbrowser_incremental_from:
     - 10.0.18
+    - 10.5
   project_name: tor-browser
   multi_lingual: 0
   build_mar: 1