d: Merge dmd. druntime e770945277, phobos 6d6e0b9b9

D front-end changes:

    - Import latest fixes from dmd v2.107.0-beta.1.
    - Hex strings can now be cast to integer arrays.
    - Add support for Interpolated Expression Sequences.

D runtime changes:

    - Import latest fixes from druntime v2.107.0-beta.1.
    - New core.interpolation module to provide run-time support for D
      interpolated expression sequence literals.

Phobos changes:

    - Import latest fixes from phobos v2.107.0-beta.1.
    - `std.range.primitives.isBidirectionalRange', and
      `std.range.primitives.isRandomAccessRange' now take an optional
      element type.

gcc/d/ChangeLog:

	* dmd/MERGE: Merge upstream dmd e770945277.
	* Make-lang.in (D_FRONTEND_OBJS): Add d/basicmangle.o, d/enumsem.o,
	d/funcsem.o, d/templatesem.o.
	* d-builtins.cc (build_frontend_type): Update for new front-end
	interface.
	* d-codegen.cc (declaration_type): Likewise.
	(parameter_type): Likewise.
	* d-incpath.cc (add_globalpaths): Likewise.
	(add_filepaths): Likewise.
	(add_import_paths): Likewise.
	* d-lang.cc (d_init_options): Likewise.
	(d_handle_option): Likewise.
	(d_parse_file): Likewise.
	* decl.cc (DeclVisitor::finish_vtable): Likewise.
	(DeclVisitor::visit (FuncDeclaration *)): Likewise.
	(get_symbol_decl): Likewise.
	* expr.cc (ExprVisitor::visit (StringExp *)): Likewise.
	Implement support for 8-byte hexadecimal strings.
	* typeinfo.cc (create_tinfo_types): Update internal TypeInfo
	representation.
	(TypeInfoVisitor::visit (TypeInfoConstDeclaration *)): Update for new
	front-end interface.
	(TypeInfoVisitor::visit (TypeInfoInvariantDeclaration *)): Likewise.
	(TypeInfoVisitor::visit (TypeInfoSharedDeclaration *)): Likewise.
	(TypeInfoVisitor::visit (TypeInfoWildDeclaration *)): Likewise.
	(TypeInfoVisitor::visit (TypeInfoClassDeclaration *)): Move data for
	TypeInfo_Class.nameSig to the end of the object.
	(create_typeinfo): Update for new front-end interface.

libphobos/ChangeLog:

	* libdruntime/MERGE: Merge upstream druntime e770945277.
	* libdruntime/Makefile.am (DRUNTIME_SOURCES): Add
	core/interpolation.d.
	* libdruntime/Makefile.in: Regenerate.
	* src/MERGE: Merge upstream phobos 6d6e0b9b9.