patch 9.0.1412: Pony files are not recognized

Problem:    Pony files are not recognized.
Solution:   Add a pattern for Pony files. (Amaan Qureshi, closes #12155)

runtime/filetype.vim

@@ -1539,6 +1539,9 @@ au BufNewFile,BufRead *.plp			setf plp
 " PO and PO template (GNU gettext)
 au BufNewFile,BufRead *.po,*.pot		setf po
 
+" Pony
+au BufNewFile,BufRead *.pony			setf pony
+
 " Postfix main config
 au BufNewFile,BufRead main.cf,main.cf.proto	setf pfmain
 

src/testdir/test_filetype.vim

@@ -448,6 +448,7 @@ let s:filename_checks = {
     \ 'pod': ['file.pod'],
     \ 'poefilter': ['file.filter'],
     \ 'poke': ['file.pk'],
+    \ 'pony': ['file.pony'],
     \ 'postscr': ['file.ps', 'file.pfa', 'file.afm', 'file.eps', 'file.epsf', 'file.epsi', 'file.ai'],
     \ 'pov': ['file.pov'],
     \ 'povini': ['.povrayrc'],

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1412,
 /**/
     1411,
 /**/