Fix SIGPIPE errors from drmserver

bug: 25284410
Change-Id: If905bb2e6b9850698a22dbeec350c7356a7a8855
diff --git a/drm/drmserver/main_drmserver.cpp b/drm/drmserver/main_drmserver.cpp
index 1ce42e8..8f697a4 100644
--- a/drm/drmserver/main_drmserver.cpp
+++ b/drm/drmserver/main_drmserver.cpp
@@ -28,6 +28,8 @@
 
 int main()
 {
+    signal(SIGPIPE, SIG_IGN);
+
     sp<ProcessState> proc(ProcessState::self());
     sp<IServiceManager> sm = defaultServiceManager();
     ALOGV("ServiceManager: %p", sm.get());