cmd: Add new cli command

This command can be used to print the current parser with 'cli get'.
It can also be used to set the current parser with 'cli set'.
For the moment, only one value is valid for set: old.

Signed-off-by: Francis Laniel <francis.laniel@amarulasolutions.com>
diff --git a/cmd/Makefile b/cmd/Makefile
index 5ed0e40..477b86c 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -229,6 +229,8 @@
 # Foundries.IO SCP03
 obj-$(CONFIG_CMD_SCP03) += scp03.o
 
+obj-$(CONFIG_HUSH_PARSER) += cli.o
+
 obj-$(CONFIG_ARM) += arm/
 obj-$(CONFIG_RISCV) += riscv/
 obj-$(CONFIG_SANDBOX) += sandbox/