Release cross-toolchain-base version 52apertis1

Signed-off-by: Andrej Shadura <andrew.shadura@collabora.co.uk>

debian/changelog

+cross-toolchain-base (52apertis1) apertis; urgency=medium
+
+  * Merge from Debian bullseye. Remaining changes:
+    - Drop unused ports (s390x ppc64el, powerpc).
+  * Drop changes applied upstream:
+    - Don’t generate conflicts when the host matches the cross arch
+      (Closes: #976923).
+
+ -- Andrej Shadura <andrew.shadura@collabora.co.uk>  Thu, 08 Apr 2021 11:15:30 +0200
+
 cross-toolchain-base (52) unstable; urgency=medium
 
   * Build using linux 5.10.13.