Merge version 2.4.85-1+rpi1 and 2.4.88-1 to produce 2.4.88-1+rpi1

diff --cc debian/changelog
index ac3e8b3f762927046478662c378178aa20205ab7,d0d865b2386731ea348e54603f9ac75beda077cf..2cbe23d971670aada2d75f5c69094b6b75eab166
--- 1/debian/changelog
--- 2/debian/changelog
+++ b/debian/changelog
@@@ -1,9 -1,9 +1,16 @@@
- libdrm (2.4.85-1+rpi1) buster-staging; urgency=medium
++libdrm (2.4.88-1+rpi1) buster-staging; urgency=medium
 +
 +  [changes brought forward from 2.4.74-1+rpi1 by Peter Michael Green <plugwash@raspbian.org> at Wed, 28 Jun 2017 21:14:42 +0000]
 +  * Move valgrind to build-conflicts, the old version in raspbian breaks the build.
 +
-  -- Raspbian forward porter <root@raspbian.org>  Sun, 05 Nov 2017 14:51:19 +0000
++ -- Raspbian forward porter <root@raspbian.org>  Wed, 22 Nov 2017 11:36:10 +0000
++
+ libdrm (2.4.88-1) unstable; urgency=medium
+ 
+   * New upstream release.
+   * Update libdrm-amdgpu1.symbols and shlibs.
+ 
+  -- Andreas Boll <andreas.boll.dev@gmail.com>  Tue, 14 Nov 2017 10:10:19 +0100
  
  libdrm (2.4.85-1) unstable; urgency=medium