Merge version 1.5-6+rpi1 and 1.6-3 to produce 1.6-3+rpi1

diff --cc debian/changelog
index bb30610cf2252f361b4e7e6f148e0e95296be934,dde6687156bab6a5c50830c33b04eda8c14fdf80..a72d8d8027a3ad99cc75aa8c9951fc54d84d5b23
--- 1/debian/changelog
--- 2/debian/changelog
+++ b/debian/changelog
@@@ -1,8 -1,43 +1,50 @@@
- pocl (1.5-6+rpi1) bullseye-staging; urgency=medium
++pocl (1.6-3+rpi1) bullseye-staging; urgency=medium
 +
++  [changes brought forward from 1.5-6+rpi1 by Peter Michael Green <plugwash@raspbian.org> at Sat, 26 Dec 2020 20:26:31 +0000]
 +  * Update symbols file for raspbian.
 +
-  -- Peter Michael Green <plugwash@raspbian.org>  Sat, 26 Dec 2020 20:26:31 +0000
++ -- Raspbian forward porter <root@raspbian.org>  Fri, 22 Jan 2021 12:17:44 +0000
++
+ pocl (1.6-3) unstable; urgency=medium
+ 
+   * Update symbols file.
+   * Upload to unstable.
+ 
+  -- Andreas Beckmann <anbe@debian.org>  Tue, 05 Jan 2021 02:08:00 +0100
+ 
+ pocl (1.6-2) experimental; urgency=medium
+ 
+   * Build with -DHARDENING_ENABLE=ON.
+   * Update symbols file for amd64 and i386.
+ 
+  -- Andreas Beckmann <anbe@debian.org>  Mon, 28 Dec 2020 23:50:16 +0100
+ 
+ pocl (1.6-1) experimental; urgency=medium
+ 
+   * New upstream release.
+   * Refresh/remove patches.
+   * Add testcase for bug #975931.
+   * Revert to llvm 9.  (Reopens: #974797)
+   * Reintroduce "visibility hidden" to expose less internal symbols.
+   * Update symbols file for amd64 and i386.
+ 
+  -- Andreas Beckmann <anbe@debian.org>  Thu, 24 Dec 2020 04:19:57 +0100
+ 
+ pocl (1.5-8) experimental; urgency=medium
+ 
+   * Cherry-pick upstream commits for llvm 11 support and some bugfixes.
+   * Switch to llvm 11.  (Closes: #974797)
+   * Update symbols file for amd64 and i386.
+   * Upload to experimental.
+ 
+  -- Andreas Beckmann <anbe@debian.org>  Tue, 17 Nov 2020 17:08:26 +0100
+ 
+ pocl (1.5-7) unstable; urgency=medium
+ 
+   * Switch to llvm 10.
+   * Update symbols file.
+ 
+  -- Andreas Beckmann <anbe@debian.org>  Mon, 16 Nov 2020 14:45:48 +0100
  
  pocl (1.5-6) unstable; urgency=medium
  

diff --cc debian/libpocl2.symbols
Simple merge