Added tag jdk8u51-b15 for changeset d68f927c1235
diff --git a/langtools/.hgtags b/langtools/.hgtags
index 3bf7289..333b27b 100644
--- a/langtools/.hgtags
+++ b/langtools/.hgtags
@@ -416,3 +416,4 @@
 f65c2fc549b5e9184da67e3a4f81260c27a88010 jdk8u51-b12
 3836d67a94a92befedd97064358270c6f0760e5c jdk8u51-b13
 f3a44c7deac2b23a53f0fd35b22a5d9181291616 jdk8u51-b14
+f77e8d012e8d6ee3432515ad68dd4f630dd08d56 jdk8u51-b15