patch 8.2.1495: "make clean" may delete too many files

Problem:    "make clean" may delete too many files.
Solution:   Do not delete $APPDIR. (closes #6751)
diff --git a/src/Makefile b/src/Makefile
index c9404fb..6a5c03c 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -2910,8 +2910,7 @@
 	-rm -f testdir/opt_test.vim
 	-rm -f $(UNITTEST_TARGETS)
 	-rm -f runtime pixmaps
-	-rm -rf $(APPDIR)
-	-rm -rf mzscheme_base.c
+	-rm -f mzscheme_base.c
 	-rm -rf libvterm/.libs libterm/t/.libs libvterm/src/*.o libvterm/src/*.lo libvterm/t/*.o libvterm/t/*.lo libvterm/t/harness libvterm/libvterm.la
 	if test -d $(PODIR); then \
 		cd $(PODIR); $(MAKE) prefix=$(DESTDIR)$(prefix) clean; \
diff --git a/src/version.c b/src/version.c
index ce970ee..126d980 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1495,
+/**/
     1494,
 /**/
     1493,