BugID:18716391: Update config name for libc
Update config name to AOS_COMP_NEWLIB_STUB and disable it by default
-config AOS_COMP_LIBC
- bool "libc"
- default y
+config AOS_COMP_NEWLIB_STUB
+ bool "libc (newlib)"
+ default n
select AOS_COMP_VFS
help
AliOS Things libc adaptation layer
