varasm.c (make_decl_rtl): Restore leading star on DECL_ASSEMBLER_NAME set for decls with an asmspec.

	* varasm.c (make_decl_rtl): Restore leading star on
	DECL_ASSEMBLER_NAME set for decls with an asmspec.
	* gcc.dg/asm-names.c: New test.

From-SVN: r36309