Fixed relative paths of the example files

src/examples/gnss_utils_test.cpp

@@ -146,7 +146,7 @@ int main(int argc, char *argv[])
   // create Navigation object
   Navigation navigation;
 
-  createObsAndNav(&observations, "../examples/raw_201805171357.obs", &navigation, "../examples/raw_201805171357.nav");
+  createObsAndNav(&observations, "../src/examples/raw_201805171357.obs", &navigation, "../src/examples/raw_201805171357.nav");
 
   nav_t nav = navigation.getNavigation();