Rethrow SIGTRAP too.

Bug: 15024256
Change-Id: I0347da9698a6ccd317ce6e6f7916d710d66e0f8a
diff --git a/linker/debugger.cpp b/linker/debugger.cpp
index 75929ac..9ebb09b 100644
--- a/linker/debugger.cpp
+++ b/linker/debugger.cpp
@@ -269,6 +269,7 @@
 #if defined(SIGSTKFLT)
     case SIGSTKFLT:
 #endif
+    case SIGTRAP:
       tgkill(getpid(), gettid(), signal_number);
       break;
     default:    // SIGILL, SIGBUS, SIGSEGV