patch 9.0.0314: VDM files are not recognized

Problem:    VDM files are not recognized.
Solution:   Add patterns for VDM files. (Alessandro Pezzoni, closes #11004)
diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index 797c73a..50de286 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -2091,6 +2091,11 @@
 " Vala
 au BufNewFile,BufRead *.vala			setf vala
 
+" VDM
+au BufRead,BufNewFile *.vdmpp,*.vpp		setf vdmpp
+au BufRead,BufNewFile *.vdmrt			setf vdmrt
+au BufRead,BufNewFile *.vdmsl,*.vdm		setf vdmsl
+
 " Vera
 au BufNewFile,BufRead *.vr,*.vri,*.vrh		setf vera
 
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 4e69175..4986b44 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -589,6 +589,9 @@
     \ 'usw2kagtlog': ['usw2kagt.log', 'USW2KAGT.LOG', 'usw2kagt.file.log', 'USW2KAGT.FILE.LOG', 'file.usw2kagt.log', 'FILE.USW2KAGT.LOG'],
     \ 'vala': ['file.vala'],
     \ 'vb': ['file.sba', 'file.vb', 'file.vbs', 'file.dsm', 'file.ctl'],
+    \ 'vdmpp': ['file.vpp', 'file.vdmpp'],
+    \ 'vdmrt': ['file.vdmrt'],
+    \ 'vdmsl': ['file.vdm', 'file.vdmsl'],
     \ 'vera': ['file.vr', 'file.vri', 'file.vrh'],
     \ 'verilog': ['file.v'],
     \ 'verilogams': ['file.va', 'file.vams'],
diff --git a/src/version.c b/src/version.c
index 60a5e7e..b1eb73f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -708,6 +708,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    314,
+/**/
     313,
 /**/
     312,