* gcc.dg/dll-1.c: Remove thumb target. Change exp to _exp.
	* gcc.dg/dll-2.c: Enable for cygwin and mingw. Remove
	thumb target,
	* gcc.dg/dll-3.c: Likewise. Adjust scan-assembler
	to accept newer _imp__	prefix and additional
	newline in .drectve section.
	* gcc.dg/dll-4.c: Likewise.
	* gcc.dg/dll-5.c: New file to test -mnop-fun-dllimport
	switch.

From-SVN: r64337