patch 9.0.1622: filetype name t32 is a bit obscure

Problem:    Filetype name t32 is a bit obscure.
Solution:   Rename t32 to trace32. (Christoph Sax, closes #12512)

runtime/filetype.vim

@@ -2235,7 +2235,7 @@ au BufNewFile,BufRead *.toml			setf toml
 au BufNewFile,BufRead *.tpp			setf tpp
 
 " TRACE32 Script Language
-au BufNewFile,BufRead *.cmm,*.t32		setf t32
+au BufNewFile,BufRead *.cmm,*.t32		setf trace32
 
 " Treetop
 au BufRead,BufNewFile *.treetop			setf treetop

src/testdir/test_filetype.vim

@@ -662,7 +662,7 @@ def s:GetFilenameChecks(): dict<list<string>>
               'any/etc/systemd/system/file.d/.#-file',
               'any/etc/systemd/system/file.d/file.conf'],
     systemverilog: ['file.sv', 'file.svh'],
-    t32: ['file.cmm', 'file.t32'],
+    trace32: ['file.cmm', 'file.t32'],
     tags: ['tags'],
     tak: ['file.tak'],
     tal: ['file.tal'],

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1622,
 /**/
     1621,
 /**/