strace: Update version from 4.5.20 to 4.19

strace 4.19 was released on September 5th, 2017. In the seven years a
lot of stuff was improved. Especially the decoding of several syscalls.

The change-log is available in the corresponding version folders, like
[1] for 4.19.

The published source archives are now compressed with LZMA, so change
the file suffix.

[1] https://sourceforge.net/projects/strace/files/strace/4.19/

strace.be0

@@ -1,10 +1,10 @@
 #!/bin/env beesh
 
-# BEE_VERSION strace-4.5.20-0
+# BEE_VERSION strace-4.19-0
 
 PGRP=( system )
 
-SRCURL="http://sourceforge.net/projects/strace/files/strace/${PV}/strace-${PV}.tar.bz2/download strace-${PV}.tar.bz2"
+SRCURL="http://sourceforge.net/projects/strace/files/strace/${PV}/strace-${PV}.tar.bz2/download strace-${PV}.tar.xz"
 
 # PATCHES=""