Mark MSVS *.vcxproj.filters files as using CR LF as well

For consistency with *.vcxproj and *.sln and for making
check_mixed_eol.sh happy.

Signed-off-by: Simon Rozman <simon@rozman.si>

.gitattributes

@@ -1,15 +1,16 @@
 # Windows-specific files that require CRLF:
 
-*.bat       eol=crlf
-*.bcc       eol=crlf
-*.dsw       eol=crlf
-*.gcc       eol=crlf
-*.props     eol=crlf
-*.rc        eol=crlf
-*.sln       eol=crlf
-*.vc        eol=crlf
-*.vcproj    eol=crlf
-*.vcxproj   eol=crlf
+*.bat             eol=crlf
+*.bcc             eol=crlf
+*.dsw             eol=crlf
+*.gcc             eol=crlf
+*.props           eol=crlf
+*.rc              eol=crlf
+*.sln             eol=crlf
+*.vc              eol=crlf
+*.vcproj          eol=crlf
+*.vcxproj         eol=crlf
+*.vcxproj.filters eol=crlf
 
 # Documentation used with Windows installer: