Ignore SIGPIPE is some of the tools used via bugreport

adb bugreport > b & sleep 5; kill $?
will show that a bunch of tools will SIGPIPE when trying to output data
which is normal.
We don't have a way on linux (bsd yes), to set NOSIGPIPE on the file desc
passed down via fork/exec.

Bug: 6447319
Change-Id: I25b30a823addcff89d252f162d0a07035d4fdd3f

cmds/dumpstate/dumpstate.c

@@ -311,6 +311,8 @@ int main(int argc, char *argv[]) {
 
     ALOGI("begin\n");
 
+    signal(SIGPIPE, SIG_IGN);
+
     /* set as high priority, and protect from OOM killer */
     setpriority(PRIO_PROCESS, 0, -20);
     FILE *oom_adj = fopen("/proc/self/oom_adj", "w");

cmds/dumpsys/dumpsys.cpp

@@ -28,6 +28,7 @@ static int sort_func(const String16* lhs, const String16* rhs)
 
 int main(int argc, char* const argv[])
 {
+    signal(SIGPIPE, SIG_IGN);
     sp<IServiceManager> sm = defaultServiceManager();
     fflush(stdout);
     if (sm == NULL) {