Merge version 5.15.1+dfsg-3+rpi1 and 5.15.2+dfsg-2 to produce 5.15.2+dfsg-2+rpi1

diff --cc debian/changelog
index 410e0fadd4d065c15968f8d52d2bfc0c73418caa,6538af004bf1df74353fb3efba73e06e0de0a5a9..9227bbb21079b1cbdc4df163e3265d1a28799ed6
--- 1/debian/changelog
--- 2/debian/changelog
+++ b/debian/changelog
@@@ -1,10 -1,21 +1,30 @@@
- qt3d-opensource-src (5.15.1+dfsg-3+rpi1) bullseye-staging; urgency=medium
++qt3d-opensource-src (5.15.2+dfsg-2+rpi1) bullseye-staging; urgency=medium
 +
++  [changes brought forward from 5.15.1+dfsg-3+rpi1 by Peter Michael Green <plugwash@raspbian.org> at Thu, 12 Nov 2020 12:19:45 +0000]
 +  * Update symbols file for raspbian.
 +  * Disable testsuite.
 +  * Fix clean target.
 +
-  -- Peter Michael Green <plugwash@raspbian.org>  Thu, 12 Nov 2020 12:19:45 +0000
++ -- Raspbian forward porter <root@raspbian.org>  Wed, 23 Dec 2020 15:17:29 +0000
++
+ qt3d-opensource-src (5.15.2+dfsg-2) unstable; urgency=medium
+ 
+   * Bump Standards-Version to 4.5.1, no changes needed.
+   * Upload to unstable.
+ 
+  -- Dmitry Shachnev <mitya57@debian.org>  Fri, 11 Dec 2020 11:31:28 +0300
+ 
+ qt3d-opensource-src (5.15.2+dfsg-1) experimental; urgency=medium
+ 
+   * New upstream release.
+   * Update debian/libqt53drender5.symbols from buildds’ logs.
+   * Bump Qt build-dependencies to 5.15.2.
+   * Build-depend only on the needed documentation tools, not on the
+     large qttools5-dev-tools package.
+   * Update debian/copyright.
+   * Update symbols files from the current build log.
+ 
+  -- Dmitry Shachnev <mitya57@debian.org>  Mon, 23 Nov 2020 20:06:25 +0300
  
  qt3d-opensource-src (5.15.1+dfsg-3) unstable; urgency=medium
  

diff --cc debian/libqt53dcore5.symbols
Simple merge

diff --cc debian/libqt53drender5.symbols
Simple merge