re PR debug/46102 (ICE: SIGSEGV in dwarf2out_finish (dwarf2out.c:8490) with -feliminate-dwarf2-dups when using precompiled headers)

	PR debug/46102
	* dwarf2out.c (dwarf2out_init): Disable -feliminate-dwarf2-dups.
testsuite/
	PR debug/46102
	* g++.dg/debug/dwarf2-1.C: XFAIL and move...
	* g++.dg/debug/dwarf2/dwarf2-1.C: ...here.
	* g++.dg/debug/dwarf2-2.C: XFAIL and move...
	* g++.dg/debug/dwarf2/dwarf2-2.C: ...here.
	* g++.dg/debug/dwarf2/typedef5.C: XFAIL.
	* g++.dg/debug/pr46123.C: XFAIL and move...
	* g++.dg/debug/dwarf2/pr46123-2.C: ...here.
	* gcc.dg/debug/dwarf2-3.c: Move...
	* gcc.dg/debug/dwarf2/dwarf2-3.c: ...here.

From-SVN: r221016