patch 8.2.1458: .gawk files not recognized

Problem:    .gawk files not recognized.
Solution:   Recognize .gawk files. (Doug Kearns)
diff --git a/src/version.c b/src/version.c
index 4c191e2..b389ee5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1458,
+/**/
     1457,
 /**/
     1456,