Release v52

- Enable Github Actions for CI test execution.

- Allow runtime configuration of debuginfo URLs by setting the
  CLR_DEBUGINFO_URLS environment variable for the clr_debug_daemon
  service.

- Make the daemon socket path and cache directory configurable at build
  time via the `--with-socket-path` and `--with-cache-dir` options,
  respectively. The default values for those two settings are unchanged.

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, 51, arjan@linux.intel.com)
+AC_INIT(clr-debug-info, 52, arjan@linux.intel.com)
 AM_INIT_AUTOMAKE([foreign -Wall -W subdir-objects])
 AM_SILENT_RULES([yes])
 AC_PROG_CC