Remark
Improve Interfaces.C.Generic_Strings by simplifying New_Chars_Ptr and moving pragma Import to the inside of conditional branches
Fix using 'Size strictly
Fix missing length check of Ada.Strings.Generic_Bounded
Delete unnecessary symbols of 'Valid for unaligned floats
Add Ada.Streams.Block_Transmission.Strings, Wide_Strings and Wide_Wide_Strings, and insert defaults into formal Read and Write of Ada.Strings.Generic_Bounded and Ada.Strings.Generic_Unbounded