Merge version 5.15.1+dfsg-2+rpi1 and 5.15.1+dfsg-4 to produce 5.15.1+dfsg-4+rpi1

diff --cc debian/changelog
index 86c7adf37b6f973b171c79e83cc054b30fda254d,d84b76c47b6510e59ecab00bc51afedb7faf91ef..6755856f1e1a21f5ea997e3e04278ddb895ddd9e
--- 1/debian/changelog
--- 2/debian/changelog
+++ b/debian/changelog
@@@ -1,12 -1,20 +1,30 @@@
- qtbase-opensource-src (5.15.1+dfsg-2+rpi1) bullseye-staging; urgency=medium
++qtbase-opensource-src (5.15.1+dfsg-4+rpi1) bullseye-staging; urgency=medium
 +
 +  [changes introduced in 5.6.1+dfsg-2+rpi1] by Peter Michael Green]
 +  * Partially fix clean target.
 +
 +  [changes introduced in 5.9.1+dfsg-9+rpi1 by Peter Michael Green]
 +  * Disable neon (-no-neon no longer seems to work, so edit configure.json instead)
 +
-  -- Raspbian forward porter <root@raspbian.org>  Fri, 06 Nov 2020 17:21:15 +0000
++ -- Raspbian forward porter <root@raspbian.org>  Tue, 01 Dec 2020 16:30:10 +0000
++
+ qtbase-opensource-src (5.15.1+dfsg-4) unstable; urgency=medium
+ 
+   [ Alexander Volkov ]
+   * Backport upstream patch xcb_screens_uaf.patch in order to fix
+     use-after-free in the xcb plugin.
+ 
+  -- Lisandro Damián Nicanor Pérez Meyer <lisandro@debian.org>  Mon, 23 Nov 2020 15:16:00 -0300
+ 
+ qtbase-opensource-src (5.15.1+dfsg-3) unstable; urgency=medium
+ 
+   * Remove debian/source/lintian-overrides. The remaining override
+     is not needed since we removed qt5-default package.
+   * Update debian/libqt5core5a.symbols for hppa.
+   * Backport upstream patch to fix issues with debugging applications
+     that use QProcess (closes: #974602).
+ 
+  -- Dmitry Shachnev <mitya57@debian.org>  Thu, 19 Nov 2020 21:39:27 +0300
  
  qtbase-opensource-src (5.15.1+dfsg-2) unstable; urgency=medium
  

diff --cc debian/patches/series
Simple merge