patch 9.0.0319: Godot shader files are not recognized

Problem:    Godot shader files are not recognized.
Solution:   Add patterns for "gdshader". (Maxim Kim, closes #11006)

runtime/filetype.vim

@@ -698,6 +698,9 @@ au BufNewFile,BufRead *.gd			setf gdscript
 " Godot resource
 au BufRead,BufNewFile *.tscn,*.tres		setf gdresource
 
+" Godot shader
+au BufRead,BufNewFile *.gdshader,*.shader	setf gdshader
+
 " Gedcom
 au BufNewFile,BufRead *.ged,lltxxxxx.txt	setf gedcom
 

src/testdir/test_filetype.vim

@@ -209,6 +209,7 @@ let s:filename_checks = {
     \ 'gdmo': ['file.mo', 'file.gdmo'],
     \ 'gdresource': ['file.tscn', 'file.tres'],
     \ 'gdscript': ['file.gd'],
+    \ 'gdshader': ['file.gdshader', 'file.shader'],
     \ 'gedcom': ['file.ged', 'lltxxxxx.txt', '/tmp/lltmp', '/tmp/lltmp-file', 'any/tmp/lltmp', 'any/tmp/lltmp-file'],
     \ 'gemtext': ['file.gmi', 'file.gemini'],
     \ 'gift': ['file.gift'],

src/version.c

@@ -707,6 +707,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    319,
 /**/
     318,
 /**/