patch 9.1.1307: make syntax does not reliably detect different flavors

Problem:  GNU extensions, such as `ifeq` and `wildcard` function, are
          highlighted in BSDmakefile
Solution: detect BSD, GNU, or Microsoft implementation according to
	  filename, user-defined global variables, or file contents

closes: #17089

Co-authored-by: Roland Hieber <rohieb@users.noreply.github.com>
Signed-off-by: Eisuke Kawashima <e-kwsm@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 166c76d..bdfcde2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1307,
+/**/
     1306,
 /**/
     1305,