patch 9.1.0977: filetype: msbuild filetypes are not recognized

Problem:  filetype: msbuild filetypes are not recognized
Solution: detect msbuild files as xml filetype
          (Gustav Eikaas)

closes: #16339

Signed-off-by: GustavEikaas <gustav.eikaas@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

Author: GustavEikaas

runtime/filetype.vim

@@ -1,7 +1,7 @@
 " Vim support file to detect file types
 "
 " Maintainer:	The Vim Project <https://github.com/vim/vim>
-" Last Change:	2024 Dec 12
+" Last Change:	2024 Dec 30
 " Former Maintainer:	Bram Moolenaar <Bram@vim.org>
 
 " Listen very carefully, I will say this only once
@@ -2916,6 +2916,9 @@ au BufNewFile,BufRead *.fsproj,*.fsproj.user	setf xml
 " VBPROJ files are Visual Studio.NET's XML-based Visual Basic project config files
 au BufNewFile,BufRead *.vbproj,*.vbproj.user	setf xml
 
+" MSBUILD configuration files are also XML
+au BufNewFile,BufRead Directory.Packages.props,Directory.Build.targets,Directory.Build.props	setf xml
+
 " Unison Language
 au BufNewFile,BufRead *.u,*.uu				setf unison
 

src/testdir/test_filetype.vim

@@ -891,7 +891,7 @@ def s:GetFilenameChecks(): dict<list<string>>
     xml: ['/etc/blkid.tab', '/etc/blkid.tab.old', 'file.xmi', 'file.csproj', 'file.csproj.user', 'file.fsproj', 'file.fsproj.user', 'file.vbproj', 'file.vbproj.user', 'file.ui',
           'file.tpm', '/etc/xdg/menus/file.menu', 'fglrxrc', 'file.xlf', 'file.xliff', 'file.xul', 'file.wsdl', 'file.wpl', 'any/etc/blkid.tab', 'any/etc/blkid.tab.old',
           'any/etc/xdg/menus/file.menu', 'file.atom', 'file.rss', 'file.cdxml', 'file.psc1', 'file.mpd', 'fonts.conf', 'file.xcu', 'file.xlb', 'file.xlc', 'file.xba', 'file.xpr',
-          'file.xpfm', 'file.spfm', 'file.bxml', 'file.mmi', 'file.slnx'],
+          'file.xpfm', 'file.spfm', 'file.bxml', 'file.mmi', 'file.slnx', 'Directory.Packages.props', 'Directory.Build.targets', 'Directory.Build.props'],
     xmodmap: ['anyXmodmap', 'Xmodmap', 'some-Xmodmap', 'some-xmodmap', 'some-xmodmap-file', 'xmodmap', 'xmodmap-file'],
     xpm: ['file.xpm'],
     xpm2: ['file.xpm2'],

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    977,
 /**/
     976,
 /**/