d: Merge dmd, druntime a6f1083699, phobos 31dedd7da

D front-end changes:

	- Import dmd v2.107.0.
	- Character postfixes can now also be used for integers of size
	  two or four.

D run-time changes:

	- Import druntime v2.107.0.

Phobos changes:

	- Import phobos v2.107.0.

gcc/d/ChangeLog:

	* dmd/MERGE: Merge upstream dmd a6f1083699.
	* dmd/VERSION: Bump version to v2.107.0
	* Make-lang.in (D_FRONTEND_OBJS): Add d/pragmasem.o.
	* d-builtins.cc (strip_type_modifiers): Update for new front-end
	interface.
	* d-codegen.cc (declaration_type): Likewise.
	(parameter_type): Likewise.
	* d-target.cc (TargetCPP::parameterType): Likewise.
	* expr.cc (ExprVisitor::visit (IndexExp *)): Likewise.
	(ExprVisitor::visit (VarExp *)): Likewise.
	(ExprVisitor::visit (AssocArrayLiteralExp *)): Likewise.
	* runtime.cc (get_libcall_type): Likewise.
	* typeinfo.cc (TypeInfoVisitor::visit (TypeInfoConstDeclaration *)):
	Likewise.
	(TypeInfoVisitor::visit (TypeInfoInvariantDeclaration *)): Likewise.
	(TypeInfoVisitor::visit (TypeInfoSharedDeclaration *)): Likewise.
	(TypeInfoVisitor::visit (TypeInfoWildDeclaration *)): Likewise.
	* types.cc (build_ctype): Likewise.

libphobos/ChangeLog:

	* libdruntime/MERGE: Merge upstream druntime a6f1083699.
	* src/MERGE: Merge upstream phobos 31dedd7da.