bionic: equalize the <unknown> program name between ssp.c and libc_init_common.c

... for the consistency sake.

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
diff --git a/libc/bionic/ssp.c b/libc/bionic/ssp.c
index 20794f4..f83b2a4 100644
--- a/libc/bionic/ssp.c
+++ b/libc/bionic/ssp.c
@@ -76,9 +76,9 @@
     sigprocmask(SIG_BLOCK, &sigmask, NULL);
 
     /* Use /proc/self/exe link to obtain the program name for logging
-     * purposes. If it's not available, we set it to "unknown" */
+     * purposes. If it's not available, we set it to "<unknown>" */
     if ((count = readlink("/proc/self/exe", path, sizeof(path) - 1)) == -1) {
-        strlcpy(path, "unknown", sizeof(path));
+        strlcpy(path, "<unknown>", sizeof(path));
     } else {
         path[count] = '\0';
     }