patch 9.0.0600: GYP files are not recognized

Problem:    GYP files are not recognized.
Solution:   Recognize GYP files. (closes #11242)
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 43f9664..ad77df3 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -240,6 +240,7 @@
     \ 'grub': ['/boot/grub/menu.lst', '/boot/grub/grub.conf', '/etc/grub.conf', 'any/boot/grub/grub.conf', 'any/boot/grub/menu.lst', 'any/etc/grub.conf'],
     \ 'gsp': ['file.gsp'],
     \ 'gtkrc': ['.gtkrc', 'gtkrc', '.gtkrc-file', 'gtkrc-file'],
+    \ 'gyp': ['file.gyp', 'file.gypi'],
     \ 'hack': ['file.hack', 'file.hackpartial'],
     \ 'haml': ['file.haml'],
     \ 'hamster': ['file.hsm'],
diff --git a/src/version.c b/src/version.c
index bfc057b..d0e14a2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    600,
+/**/
     599,
 /**/
     598,