vim: Import v8.0.1509

* 8.0.1509: test for failing drag-n-drop command no longer fails
* 8.0.1508: the :drop command is not always available
* 8.0.1507: timer test is a bit flaky
* 8.0.1506: new version of HP NonStop (Tandem) doesn't like a header

Author: chrisbra

gitlog.txt

@@ -1 +1 @@
-* [8.0.1505](https://github.com/vim/vim/releases/tag/v8.0.1505): debugger can't break on a condition\n* [8.0.1504](https://github.com/vim/vim/releases/tag/v8.0.1504): Win32: the screen may be cleared on startup\n* [8.0.1503](https://github.com/vim/vim/releases/tag/v8.0.1503): access memory beyond end of string\n* [8.0.1502](https://github.com/vim/vim/releases/tag/v8.0.1502): in out-of-memory situation character is not restored\n* [8.0.1501](https://github.com/vim/vim/releases/tag/v8.0.1501): out-of-memory situation not correctly handled\n* [8.0.1500](https://github.com/vim/vim/releases/tag/v8.0.1500): possible NULL pointer dereference\n* [8.0.1499](https://github.com/vim/vim/releases/tag/v8.0.1499): out-of-memory situation not correctly handled\n* [8.0.1498](https://github.com/vim/vim/releases/tag/v8.0.1498): getjumplist() returns duplicate entries
+* [8.0.1509](https://github.com/vim/vim/releases/tag/v8.0.1509): test for failing drag-n-drop command no longer fails\n* [8.0.1508](https://github.com/vim/vim/releases/tag/v8.0.1508): the :drop command is not always available\n* [8.0.1507](https://github.com/vim/vim/releases/tag/v8.0.1507): timer test is a bit flaky\n* [8.0.1506](https://github.com/vim/vim/releases/tag/v8.0.1506): new version of HP NonStop (Tandem) doesn't like a header