Clarifies how to use gtest as a shared library in README.
Clarifies how to use gtest as a shared library in README.


duythanhphan/googletest,smarr/googletest,lijun0914/googletest,smarr/googletest,smarr/googletest,lijun0914/googletest,haoranzeus/googletest,lijun0914/googletest,duythanhphan/googletest,haoranzeus/googletest,haoranzeus/googletest,smarr/googletest,duythanhphan/googletest,duythanhphan/googletest