qemu-rr: remove ./run -r and -R record and replay short options

In line with the "be very conservative with short options" philosophy.

qemu-rr

@@ -1,4 +1,4 @@
 #!/usr/bin/env bash
 set -eu
-./run -r "$@"
-./run -R "$@"
+./run --record "$@"
+./run --replay "$@"

run

@@ -220,13 +220,11 @@ Setup a kernel init parameter that makes the emulator quit immediately after boo
 '''
         )
         self.add_argument(
-            '-R',
             '--replay',
             default=False,
             help='Replay a QEMU run record deterministically'
         )
         self.add_argument(
-            '-r',
             '--record',
             default=False,
             help='Record a QEMU run record for later replay with `-R`'