Release v51

Switches the debuginfo tarball compression format from xz to zstd.

Signed-off-by: Patrick McCarty <patrick.mccarty@intel.com>

Author: phmccarty

configure.ac

@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.66])
-AC_INIT(clr-debug-info, 50, arjan@linux.intel.com)
+AC_INIT(clr-debug-info, 51, arjan@linux.intel.com)
 AM_INIT_AUTOMAKE([foreign -Wall -W subdir-objects])
 AM_SILENT_RULES([yes])
 AC_PROG_CC