Fix framework and system _$(TARGET) Makefile targets
Fix framework and system _$(TARGET) Makefile targets

These make targets were omitted during the Makefile changes to support
KConfig.

Resolves: LE-12237
Change-Id: Ia9ebca795523b7ddcbc9594766ab65c3eccc142b

legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af