d: Ensure all unittests are registered against the original module.

As any unittest functions registered against the testing module when
compiling with -fbuilding-libphobos-tests are ignored during the
generation of the ModuleInfo data.

gcc/d/ChangeLog:

2019-04-21  Iain Buclaw  <ibuclaw@gdcproject.org>

	* modules.cc (register_module_decl): Don't register unittests against
	the ModuleInfo symbol for -fbuilding-libphobos-tests.

From-SVN: r270477

gcc/d/ChangeLog

+2019-04-21  Iain Buclaw  <ibuclaw@gdcproject.org>
+
+	* modules.cc (register_module_decl): Don't register unittests against
+	the ModuleInfo symbol for -fbuilding-libphobos-tests.
+
 2019-04-17  Iain Buclaw  <ibuclaw@gdcproject.org>
 
 	* d-system.h (POSIX): Define unix as POSIX.

gcc/d/modules.cc

@@ -836,7 +836,8 @@ register_module_decl (Declaration *d)
 	 compiling in unittests are kept track of separately so they are
 	 not omitted when compiling with -fbuilding-libphobos-tests.  */
       module_info *minfo;
-      if (flag_building_libphobos_tests && DECL_IN_UNITTEST_CONDITION_P (decl))
+      if (flag_building_libphobos_tests && !fd->isUnitTestDeclaration ()
+	  && DECL_IN_UNITTEST_CONDITION_P (decl))
 	minfo = current_testing_module;
       else
 	minfo = current_moduleinfo;