bash_completion: Add a couple missing commands

Add "bitswap" and "repo" to bash completion for `ipfs stats`. They are
listed under `ipfs stats --help`.

Also added their respective subcommands.

License: MIT
Signed-off-by: Nathan Musoke <nathan.musoke@gmail.com>

misc/completion/ipfs-completion.bash

@@ -314,7 +314,12 @@ _ipfs_resolve()
 
 _ipfs_stats()
 {
-    _ipfs_comp "bw --help"
+    _ipfs_comp "bitswap bw repo --help"
+}
+
+_ipfs_stats_bitswap()
+{
+    _ipfs_help_only
 }
 
 _ipfs_stats_bw()
@@ -322,6 +327,11 @@ _ipfs_stats_bw()
     _ipfs_comp "--peer= --proto= --poll --interval= --help"
 }
 
+_ipfs_stats_repo()
+{
+    _ipfs_comp "--human="
+}
+
 _ipfs_swarm()
 {
     _ipfs_comp "addrs connect disconnect filters peers --help"