Improve netd detection

The alleged improvement consists in making the detection actually work
when netd is spawned by init, which of course uses the full path.
I had tested the previous logic by running netd from the shell, which
worked because argv[0] was just set to "netd". My bad -_-

Test: flash, boot and grep logcat for "Skipping libnetd_client init"
Change-Id: Ie5f11436dfa2a9347721147dc2b980144452404a
diff --git a/libc/bionic/NetdClient.cpp b/libc/bionic/NetdClient.cpp
index 966cbcc..a5c519e 100644
--- a/libc/bionic/NetdClient.cpp
+++ b/libc/bionic/NetdClient.cpp
@@ -39,7 +39,7 @@
 static void netdClientInitImpl() {
     // Prevent netd from looping back fwmarkd connections to itself. It would work, but it's
     // a deadlock hazard and unnecessary overhead for the resolver.
-    if (getuid() == 0 && strcmp(getprogname(), "netd") == 0) {
+    if (getuid() == 0 && strcmp(basename(getprogname()), "netd") == 0) {
         async_safe_format_log(ANDROID_LOG_INFO, "netdClient",
                               "Skipping libnetd_client init since *we* are netd");
         return;