patch 8.0.1348: make testclean deletes script file on MS-Windows

Problem:    Make testclean deletes script file on MS-Windows.
Solution:   Rename file to avoid it starting with an "x".
diff --git a/Filelist b/Filelist
index 9328943..12d9e00 100644
--- a/Filelist
+++ b/Filelist
@@ -119,7 +119,6 @@
 		src/testdir/test[0-9]*a.ok \
 		src/testdir/test_[a-z]*.ok \
 		src/testdir/test49.vim \
-		src/testdir/test60.vim \
 		src/testdir/test83-tags? \
 		src/testdir/test77a.com \
 		src/testdir/test_*.vim \
@@ -138,7 +137,7 @@
 		src/testdir/samples/*.txt \
 		src/testdir/samples/test000 \
 		src/testdir/if_ver*.vim \
-		src/testdir/xterm_ramp.vim \
+		src/testdir/color_ramp.vim \
 		src/proto.h \
 		src/proto/arabic.pro \
 		src/proto/beval.pro \