main.py: clarify output and add to manifest.py

internal_filesystem/main.py

@@ -5,6 +5,6 @@
 import sys
 sys.path.insert(0, 'lib')
 
-print("Passing execution over to MicroPythonOS's main.py")
+print("Passing execution over to mpos.main")
 import mpos.main
 

manifests/manifest.py

@@ -1,3 +1,3 @@
-freeze('../internal_filesystem/', 'boot.py') # Hardware initialization
+freeze('../internal_filesystem/', 'main.py') # Hardware initialization
 freeze('../internal_filesystem/lib', '') # Additional libraries
 freeze('../freezeFS/', 'freezefs_mount_builtin.py') # Built-in apps