xz/lzma: upgrade to 5.8.3

Downloaded from https://github.com/tukaani-project/xz/releases/download/v5.8.3/xz-5.8.3.tar.gz

Change-Id: I13b8acc623ec8ad2fadc057c89a1380bc88a68e2
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/203117
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>
Tested-by: Jenkins
diff --git a/download.lst b/download.lst
index 1bcc5c0..20463c0 100644
--- a/download.lst
+++ b/download.lst
@@ -477,8 +477,8 @@
 # three static lines
 # so that git cherry-pick
 # will not run into conflicts
-LZMA_SHA256SUM := ce09c50a5962786b83e5da389c90dd2c15ecd0980a258dd01f70f9e7ce58a8f1
-LZMA_TARBALL := xz-5.8.2.tar.gz
+LZMA_SHA256SUM := 3d3a1b973af218114f4f889bbaa2f4c037deaae0c8e815eec381c3d546b974a0
+LZMA_TARBALL := xz-5.8.3.tar.gz
 # three static lines
 # so that git cherry-pick
 # will not run into conflicts