libs/lpk: Fixed typos

libs/lpk/luasrc/lpk/core/install.lua

@@ -7,9 +7,9 @@ end
 
 function process(register)
 	register.sometext = "Test"
-	if not register.retreived then
-		print("Step down to retreive")
-		return "retreive"
+	if not register.retrieved then
+		print("Step down to retrieve")
+		return "retrieve"
 	else
 		print("Coming up again")
 	end

libs/lpk/luasrc/lpk/core/retreive.lua

@@ -1,7 +0,0 @@
-module("luci.lpk.core.retreive", package.seeall)
-
-function process(register)
-	print "Now in retreive"
-	print (register.sometext)
-	register.retreived = true
-end

libs/lpk/luasrc/lpk/core/retrieve.lua

@@ -0,0 +1,7 @@
+module("luci.lpk.core.retrieve", package.seeall)
+
+function process(register)
+	print "Now in retrieve"
+	print (register.sometext)
+	register.retrieved = true
+end