Save the file downloaded by wget with proper name.

.travis.yml

@@ -16,7 +16,7 @@ install:
   - sudo apt-get install -y mono-devel nuget p7zip-full
   - nuget install NUnit.Runners -Version 2.6.4 -OutputDirectory testrunner
   - if [ "$CXX" = "g++" ]; then export CXX="g++-4.8" CC="gcc-4.8"; fi
-  - wget https://www.dropbox.com/s/zxigif3vghsdfli/llvm_linux_x86_64.7z?dl=0
+  - wget -O llvm_linux_x86_64.7z https://www.dropbox.com/s/zxigif3vghsdfli/llvm_linux_x86_64.7z?dl=0
   - 7z x llvm_linux_x86_64.7z -odeps/llvm -y  
 
 script: