patch 8.1.1039: MS-Windows build fails

Problem:    MS-Windows build fails.
Solution:   Remove dependency on arabic.h

Author: brammool

src/Make_cyg_ming.mak

@@ -1004,7 +1004,7 @@ endif
 	$(MAKE) -C tee clean
 
 ###########################################################################
-INCL =	vim.h alloc.h arabic.h ascii.h ex_cmds.h feature.h globals.h \
+INCL =	vim.h alloc.h ascii.h ex_cmds.h feature.h globals.h \
 	keymap.h macros.h option.h os_dos.h os_win32.h proto.h regexp.h \
 	spell.h structs.h term.h beval.h $(NBDEBUG_INCL)
 GUI_INCL = gui.h

src/Make_mvc.mak

@@ -693,7 +693,7 @@ CFLAGS = $(CFLAGS) /Zl /MTd
 !include Make_all.mak
 !include testdir\Make_all.mak
 
-INCL =	vim.h alloc.h arabic.h ascii.h ex_cmds.h feature.h globals.h \
+INCL =	vim.h alloc.h ascii.h ex_cmds.h feature.h globals.h \
 	keymap.h macros.h option.h os_dos.h os_win32.h proto.h regexp.h \
 	spell.h structs.h term.h beval.h $(NBDEBUG_INCL)