re PR c++/44641 (Generated constructors and destructors get wrong debug location when a typedef uses a forward declaration of the type before the definition)

PR c++/44641
        * gcc/cp/pt.c (instantiate_class_template): Propagate the
        template's location to its instance.

       	* gcc/testsuite/lib/scanasm.exp (dg-function-on-line): Test
        that a function is defined on the current line.
        * gcc/testsuite/g++.dg/debug/dwarf2/lineno-simple1.C: New.
        Line number sanity test.
        * gcc/testsuite/g++.dg/debug/dwarf2/pr44641.C: New.

From-SVN: r162349