CHANGES: Add two changes backported to the 4.99 branch

[skip ci]

Author: fxlb

CHANGES

@@ -142,6 +142,8 @@ DayOfTheWeek, Month DD, YYYY / The Tcpdump Group
       tests: Use the -tttt option, by default, for the tests.
       Autoconf, CMake: Get the size of a void * and a time_t.
       Fix propagation of cc_werr_cflags() output.
+      Makefile.in: Fix the depend target.
+      mkdep: Exit with a non-zero status if a command fails.
     Documentation:
       Fixed errors in doc/README.Win32.md and renamed it to
         README.windows.md.