patch 9.1.0846: debug symbols for xxd are not cleaned in Makefile

Problem:  debug symbols for xxd are not cleaned in Makefile
Solution: remove  xxd.dSYM in xxds Makefile, call xxd clean target from
          main Makefile (Yee Cheng Chin)

Remove xxd.dSYM folder when calling `make clean`. On macOS, when
compiling with debug info, clang will generate a "dSYM" folder that
contains debug symbols for the executable because unlike Linux, the
DWARF data is not embedded in the executable itself.

closes: #16010

Signed-off-by: Yee Cheng Chin <ychin.git@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/Makefile

@@ -2882,9 +2882,9 @@ uninstall_runtime:
 # Clean up all the files that have been produced, except configure's.
 # We support common typing mistakes for Juergen! :-)
 clean celan: testclean
-	-rm -f *.o core $(VIMTARGET).core $(VIMTARGET) vim xxd/*.o
+	-rm -f *.o core $(VIMTARGET).core $(VIMTARGET) vim
 	-rm -rf objects
-	-rm -f $(TOOLS) auto/osdef.h auto/pathdef.c auto/if_perl.c auto/gui_gtk_gresources.c auto/gui_gtk_gresources.h auto/os_haiku.rdef
+	-rm -f auto/osdef.h auto/pathdef.c auto/if_perl.c auto/gui_gtk_gresources.c auto/gui_gtk_gresources.h auto/os_haiku.rdef
 	-rm -f conftest* *~ auto/link.sed
 	-rm -f testdir/opt_test.vim
 	-rm -f $(UNITTEST_TARGETS)
@@ -2894,6 +2894,7 @@ clean celan: testclean
 	if test -d $(PODIR); then \
 		cd $(PODIR); $(MAKE) prefix=$(DESTDIR)$(prefix) clean; \
 	fi
+	cd xxd; $(MAKE) clean
 
 # Make a shadow directory for compilation on another system or with different
 # features:

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    846,
 /**/
     845,
 /**/

src/xxd/Makefile

@@ -5,3 +5,4 @@ xxd: xxd.c
 
 clean:
 	rm -f xxd xxd.o
+	rm -rf xxd.dSYM