PR testsuite/40426

	PR testsuite/40426
	* lib/gcc-dg.exp (gcc-dg-debug-runtest): For type -gdwarf-2 and
	level != "" use separate -gdwarf-2 -g${level} options instead of
	-gdwarf-2${level}.
	* lib/gfortran-dg.exp (gfortran-dg-debug-runtest): Likewise.
	* gfortran.dg/debug/pr37738.f: Also skip if -gdwarf-2 -g1.
	* gfortran.dg/debug/pr35154-dwarf2.f: Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@148497 138bc75d-0d04-0410-961f-82ee72b054a4