Fix common misspellings and typos

Change-Id: I4ec7accb1912c052b446be7c399bed32a8c62253
diff --git a/CommonLibs/Timeval.h b/CommonLibs/Timeval.h
index 0826c12..18ea4b4 100644
--- a/CommonLibs/Timeval.h
+++ b/CommonLibs/Timeval.h
@@ -84,7 +84,7 @@
 	uint32_t usec() const { return mTimespec.tv_nsec / 1000; }
 	uint32_t nsec() const { return mTimespec.tv_nsec; }
 
-	/** Return differnce from other (other-self), in ms. */
+	/** Return difference from other (other-self), in ms. */
 	long delta(const Timeval& other) const;
 
 	/** Elapsed time in ms. */