Improve OOM kill message (#108039)

Author: cshung

eng/testing/RunnerTemplate.sh

@@ -56,7 +56,7 @@ exitcode_list[133]="SIGTRAP Breakpoint hit. Core dumped."
 exitcode_list[134]="SIGABRT Abort. Managed or native assert, or runtime check such as heap corruption, caused call to abort(). Core dumped."
 exitcode_list[135]="IGBUS   Unaligned memory access. Core dumped."
 exitcode_list[136]="SIGFPE  Bad floating point arguments. Core dumped."
-exitcode_list[137]="SIGKILL Killed either due to out of memory/resources (see /var/log/messages) or by explicit kill."
+exitcode_list[137]="SIGKILL Killed either due to out of memory/resources (see /var/log/messages) or by explicit kill. No dump will be available for this."
 exitcode_list[139]="SIGSEGV Illegal memory access. Deref invalid pointer, overrunning buffer, stack overflow etc. Core dumped."
 exitcode_list[143]="SIGTERM Terminated. Usually before SIGKILL."
 exitcode_list[159]="SIGSYS  Bad System Call."