patch 8.2.4424: ".gts" and ".gjs" files are not recognized

Problem:    ".gts" and ".gjs" files are not recognized.
Solution:   Recognize Glimmer flavored typescript and javascript.
            (closes #9799)

runtime/filetype.vim

@@ -730,6 +730,10 @@ au BufNewFile,BufRead gnashrc,.gnashrc,gnashpluginrc,.gnashpluginrc setf gnash
 au BufNewFile,BufRead gitolite.conf		setf gitolite
 au BufNewFile,BufRead {,.}gitolite.rc,example.gitolite.rc	setf perl
 
+" Glimmer-flavored TypeScript and JavaScript
+au BufNewFile,BufRead *.gts	setf typescript.glimmer
+au BufNewFile,BufRead *.gjs	setf javascript.glimmer
+
 " Gnuplot scripts
 au BufNewFile,BufRead *.gpi,.gnuplot		setf gnuplot
 

src/testdir/test_filetype.vim

@@ -272,6 +272,7 @@ let s:filename_checks = {
     \ 'java': ['file.java', 'file.jav'],
     \ 'javacc': ['file.jj', 'file.jjt'],
     \ 'javascript': ['file.js', 'file.javascript', 'file.es', 'file.mjs', 'file.cjs'],
+    \ 'javascript.glimmer': ['file.gjs'],
     \ 'javascriptreact': ['file.jsx'],
     \ 'jess': ['file.clp'],
     \ 'jgraph': ['file.jgr'],
@@ -547,6 +548,7 @@ let s:filename_checks = {
     \ 'tssgm': ['file.tssgm'],
     \ 'tssop': ['file.tssop'],
     \ 'twig': ['file.twig'],
+    \ 'typescript.glimmer': ['file.gts'],
     \ 'typescriptreact': ['file.tsx'],
     \ 'uc': ['file.uc'],
     \ 'udevconf': ['/etc/udev/udev.conf', 'any/etc/udev/udev.conf'],

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4424,
 /**/
     4423,
 /**/