patch 9.0.1644: not all filetype file name matches are tested

Problem:    Not all filetype file name matches are tested.
Solution:   Add more file names to test with. (Jonas Strittmatter,
            closes #12569)
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 9c1b11d..8a38fb7 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -601,7 +601,7 @@
     services: ['/etc/services', 'any/etc/services'],
     setserial: ['/etc/serial.conf', 'any/etc/serial.conf'],
     sexplib: ['file.sexp'],
-    sh: ['.bashrc', 'file.bash', '/usr/share/doc/bash-completion/filter.sh', '/etc/udev/cdsymlinks.conf', 'any/etc/udev/cdsymlinks.conf'],
+    sh: ['.bashrc', '.bash_profile', '.bash-profile', '.bash_logout', '.bash-logout', '.bash_aliases', '.bash-aliases', '/tmp/bash-fc-3Ozjlw', '/tmp/bash-fc.3Ozjlw', 'PKGBUILD', 'APKBUILD', 'file.bash', '/usr/share/doc/bash-completion/filter.sh', '/etc/udev/cdsymlinks.conf', 'any/etc/udev/cdsymlinks.conf'],
     sieve: ['file.siv', 'file.sieve'],
     sil: ['file.sil'],
     simula: ['file.sim'],
diff --git a/src/version.c b/src/version.c
index c5aa47a..5ad3b34 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1644,
+/**/
     1643,
 /**/
     1642,