patch 8.2.0415: bsdl filetype is not detected

Problem:    Bsdl filetype is not detected.
Solution:   Add an entry in the filetype list. (Daniel Kho, closes #5810)

runtime/filetype.vim

@@ -233,6 +233,9 @@ au BufNewFile,BufRead *.bl			setf blank
 " Blkid cache file
 au BufNewFile,BufRead */etc/blkid.tab,*/etc/blkid.tab.old   setf xml
 
+" BSDL
+au BufNewFile,BufRead *.bsdl			setf bsdl
+
 " Bazel (http://bazel.io)
 autocmd BufRead,BufNewFile *.bzl,WORKSPACE,BUILD.bazel 	setf bzl
 if has("fname_case")
@@ -1773,7 +1776,7 @@ au BufNewFile,BufRead *.va,*.vams		setf verilogams
 au BufNewFile,BufRead *.sv,*.svh		setf systemverilog
 
 " VHDL
-au BufNewFile,BufRead *.hdl,*.vhd,*.vhdl,*.vbe,*.vst  setf vhdl
+au BufNewFile,BufRead *.hdl,*.vhd,*.vhdl,*.vbe,*.vst,*.vho  setf vhdl
 
 " Vim script
 au BufNewFile,BufRead *.vim,*.vba,.exrc,_exrc	setf vim

src/testdir/test_filetype.vim

@@ -79,6 +79,7 @@ let s:filename_checks = {
     \ 'bib': ['file.bib'],
     \ 'bindzone': ['named.root'],
     \ 'blank': ['file.bl'],
+    \ 'bsdl': ['file.bsdl'],
     \ 'bst': ['file.bst'],
     \ 'bzr': ['bzr_log.any'],
     \ 'c': ['enlightenment/file.cfg', 'file.qc', 'file.c'],
@@ -481,7 +482,7 @@ let s:filename_checks = {
     \ 'verilog': ['file.v'],
     \ 'verilogams': ['file.va', 'file.vams'],
     \ 'vgrindefs': ['vgrindefs'],
-    \ 'vhdl': ['file.hdl', 'file.vhd', 'file.vhdl', 'file.vbe', 'file.vst', 'file.vhdl_123'],
+    \ 'vhdl': ['file.hdl', 'file.vhd', 'file.vhdl', 'file.vbe', 'file.vst', 'file.vhdl_123', 'file.vho'],
     \ 'vim': ['file.vim', 'file.vba', '.exrc', '_exrc'],
     \ 'viminfo': ['.viminfo', '_viminfo'],
     \ 'vmasm': ['file.mar'],

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    415,
 /**/
     414,
 /**/