logd: klogd: deal with htc modified printk

Skip leading 'c0  32767 ' and place pid (32767 in example) into pid
field of log record.

Bug: 29831823
Change-Id: I9fcd3cb0235dfcad78627736712a20d2dc1250cc
diff --git a/logd/LogKlog.h b/logd/LogKlog.h
index ee73b71..a4f871e 100644
--- a/logd/LogKlog.h
+++ b/logd/LogKlog.h
@@ -51,7 +51,7 @@
 
 protected:
     void sniffTime(log_time &now, const char **buf, size_t len, bool reverse);
-    pid_t sniffPid(const char *buf, size_t len);
+    pid_t sniffPid(const char **buf, size_t len);
     void calculateCorrection(const log_time &monotonic,
                              const char *real_string, size_t len);
     virtual bool onDataAvailable(SocketClient *cli);