runCI: logs now show CPU/OS/etc info to be self contained (#13486)

koch.nim

@@ -472,9 +472,14 @@ proc xtemp(cmd: string) =
   finally:
     copyExe(d / "bin" / "nim_backup".exe, d / "bin" / "nim".exe)
 
+proc hostInfo(): string =
+  "hostOS: $1, hostCPU: $2, int: $3, float: $4, cpuEndian: $5, cwd: $6" %
+    [hostOS, hostCPU, $int.sizeof, $float.sizeof, $cpuEndian, getCurrentDir()]
+
 proc runCI(cmd: string) =
   doAssert cmd.len == 0, cmd # avoid silently ignoring
   echo "runCI:", cmd
+  echo hostInfo()
   # note(@araq): Do not replace these commands with direct calls (eg boot())
   # as that would weaken our testing efforts.
   when defined(posix): # appveyor (on windows) didn't run this