vim-patch:8.2.4571: not all gdb files are recognized (#17727)

Problem:    Not all gdb files are recognized.
Solution:   Add a few more patterns for gdb.
            (closes https://github.com/vim/vim/pull/9956)
8d5e514d77

runtime/filetype.vim

@@ -664,7 +664,7 @@ au BufNewFile,BufRead *.fs			call dist#ft#FTfs()
 au BufNewFile,BufRead *.fsi,*.fsx		setf fsharp
 
 " GDB command files
-au BufNewFile,BufRead .gdbinit,gdbinit		setf gdb
+au BufNewFile,BufRead .gdbinit,gdbinit,.gdbearlyinit,gdbearlyinit,*.gdb		setf gdb
 
 " GDMO
 au BufNewFile,BufRead *.mo,*.gdmo		setf gdmo

runtime/lua/vim/filetype.lua

@@ -225,6 +225,7 @@ local extension = {
   fsi = "fsharp",
   fsx = "fsharp",
   fusion = "fusion",
+  gdb = "gdb",
   gdmo = "gdmo",
   mo = "gdmo",
   tres = "gdresource",
@@ -919,6 +920,8 @@ local filename = {
   mtab = "fstab",
   [".gdbinit"] = "gdb",
   gdbinit = "gdb",
+  [".gdbearlyinit"] = "gdb",
+  gdbearlyinit = "gdb",
   ["lltxxxxx.txt"] = "gedcom",
   ["TAG_EDITMSG"] = "gitcommit",
   ["MERGE_MSG"] = "gitcommit",