update build engine with specialized dyndep processing

bobzhang · bobzhang · commit d518b94fd51d · 2020-11-04T15:34:24.000+08:00
diff --git a/ninja b/ninja
@@ -1 +1 @@
-Subproject commit ae55755e56d75d5dfdaed223e13ec0526409012c
+Subproject commit 50843eaf0bef780454ee857014b5d2bd25207922
