netd: Remove sigchild handler and fix a bluetooth makefile bug

Signed-off-by: San Mehat <san@google.com>
diff --git a/main.cpp b/main.cpp
index 7c31179..73cbd9c 100644
--- a/main.cpp
+++ b/main.cpp
@@ -43,7 +43,7 @@
 
     LOGI("Netd 1.0 starting");
 
-    signal(SIGCHLD, sigchld_handler);
+//    signal(SIGCHLD, sigchld_handler);
 
     if (!(nm = NetlinkManager::Instance())) {
         LOGE("Unable to create NetlinkManager");