Convert LIB_UUID to Kconfig

config_fallback.h has some logic that checks a variety of options
and selects LIB_UUID if it hasn't already been selected.  This
will all LIB_UUID in Kconfig and select this option for the list
of options to allow us to remove the logic from fallbacks

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 790c404..4d9ef87 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -679,6 +679,7 @@
 
 config RANDOM_UUID
 	bool "GPT Random UUID generation"
+	select LIB_UUID
 	help
 	  Enable the generation of partitions with random UUIDs if none
 	  are provided.
@@ -1180,6 +1181,7 @@
 
 config CMD_UUID
 	bool "uuid, guid - generation of unique IDs"
+	select LIB_UUID
 	help
 	  This enables two commands: