Add gtest download script to the get_third_party script
Add gtest download script to the get_third_party script

bitemyapp/libjingle,shiquxinkong/jingle,vigsterkr/libjingle,deepak899/libjingle,princeofdarkness76/swtoolkit,iamnpc/libjingle,deepak899/libjingle,shiquxinkong/jingle,bitemyapp/libjingle,deepak899/libjingle,bitemyapp/libjingle,bitemyapp/libjingle,princeofdarkness76/swtoolkit,iamnpc/libjingle,vigsterkr/libjingle,princeofdarkness76/swtoolkit,princeofdarkness76/swtoolkit,iamnpc/libjingle,deepak899/libjingle,bitemyapp/libjingle,shiquxinkong/jingle,shiquxinkong/jingle,vigsterkr/libjingle,deepak899/libjingle,vigsterkr/libjingle,iamnpc/libjingle,shiquxinkong/jingle,princeofdarkness76/swtoolkit,vigsterkr/libjingle,iamnpc/libjingle,deepak899/libjingle,shiquxinkong/jingle,princeofdarkness76/swtoolkit,bitemyapp/libjingle,iamnpc/libjingle