patch 8.0.1326: largefile test fails on CI, glob test on MS-Windows

Problem:    Largefile test fails on CI, glob test on MS-Windows.
Solution:   Remove largefile test from list of all tests. Don't run
            Test_glob() on non-unix systems.  More cleanup. (Yegappan
            Lakshmanan, closes #2354)
diff --git a/src/testdir/Make_all.mak b/src/testdir/Make_all.mak
index d1ff7aa..6e33564 100644
--- a/src/testdir/Make_all.mak
+++ b/src/testdir/Make_all.mak
@@ -67,6 +67,7 @@
 
 # Tests using runtest.vim
 # Keep test_alot*.res as the last one, sort the others.
+# test_largefile.res is omitted, it uses too much resources to run on CI.
 NEW_TESTS = test_arabic.res \
 	    test_arglist.res \
 	    test_assert.res \
@@ -122,7 +123,6 @@
 	    test_job_fails.res \
 	    test_json.res \
 	    test_langmap.res \
-	    test_largefile.res \
 	    test_let.res \
 	    test_lineending.res \
 	    test_listchars.res \