patch 9.0.0497: LyRiCs files are not recognized

Problem:    LyRiCs files are not recognized.
Solution:   Add a pattern to detect LyRiCs files. (closes #11155)

runtime/filetype.vim

@@ -448,6 +448,9 @@ endif
 " Lynx config files
 au BufNewFile,BufRead lynx.cfg			setf lynx
 
+" LyRiCs
+au BufNewFile,BufRead *.lrc			setf lyrics
+
 " Modula-3 configuration language (must be before *.cfg and *makefile)
 au BufNewFile,BufRead *.quake,cm3.cfg		setf m3quake
 au BufNewFile,BufRead m3makefile,m3overrides	setf m3build

src/testdir/test_filetype.vim

@@ -327,6 +327,7 @@ let s:filename_checks = {
     \ 'lss': ['file.lss'],
     \ 'lua': ['file.lua', 'file.rockspec', 'file.nse'],
     \ 'lynx': ['lynx.cfg'],
+    \ 'lyrics': ['file.lrc'],
     \ 'm3build': ['m3makefile', 'm3overrides'],
     \ 'm3quake': ['file.quake', 'cm3.cfg'],
     \ 'm4': ['file.at'],

src/version.c

@@ -699,6 +699,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    497,
 /**/
     496,
 /**/