Add mode to open call with O_CREAT

This change was already applied internally. For us to submit FORTIFY, we
need to push it out here. Otherwise, we get compile-time errors about
this.

Bug: 32073964
Test: Builds with FORTIFY.
Change-Id: Ib500aca933468c06f7ceb796a9bb6a16c118e366
Merged-In: I63eb3d5499ae7e9ff9a77393763e39b747fd4611
diff --git a/cmds/atrace/atrace.cpp b/cmds/atrace/atrace.cpp
index ee2b275..64f7b82 100644
--- a/cmds/atrace/atrace.cpp
+++ b/cmds/atrace/atrace.cpp
@@ -1243,7 +1243,7 @@
             fflush(stdout);
             int outFd = STDOUT_FILENO;
             if (g_outputFile) {
-                outFd = open(g_outputFile, O_WRONLY | O_CREAT);
+                outFd = open(g_outputFile, O_WRONLY | O_CREAT, 0644);
             }
             if (outFd == -1) {
                 printf("Failed to open '%s', err=%d", g_outputFile, errno);