runtime(filetype): tests: Test_filetype_detection() fails

Problem:  tests: Test_filetype_detection() fails (after 9.1.0738)
Solution: Add missing filetype detect patterns for *.SYSx and *.MODx

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index 7c19fb6..9efa11d 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -243,7 +243,7 @@
 endif
 au BufNewFile,BufRead *.sysx			setf rapid
 if has("fname_case")
-  au BufNewFile,BufRead *.sysX,*.Sysx,*.SysX,*.SYSX	setf rapid
+  au BufNewFile,BufRead *.sysX,*.Sysx,*.SysX,*.SYSX,*.SYSx	setf rapid
 endif
 
 " Batch file for 4DOS
@@ -1506,7 +1506,7 @@
 endif
 au BufNewFile,BufRead *.modx			setf rapid
 if has("fname_case")
-   au BufNewFile,BufRead *.modX,*.Modx,*.ModX,*.MODX	setf rapid
+   au BufNewFile,BufRead *.modX,*.Modx,*.ModX,*.MODX,*.MODx	setf rapid
 endif
 
 " Modula-3 (.m3, .i3, .mg, .ig)