Travis: Update GLFW on Linux to 3.1.1

.travis-deps.sh

@@ -7,10 +7,13 @@ set -x
 if [ "$TRAVIS_OS_NAME" = "linux" -o -z "$TRAVIS_OS_NAME" ]; then
     export CC=gcc-4.9
     export CXX=g++-4.9
-
     mkdir -p $HOME/.local
+
+    curl http://www.cmake.org/files/v2.8/cmake-2.8.11-Linux-i386.tar.gz \
+        | tar -xz -C $HOME/.local --strip-components=1
+
     (
-        git clone https://github.com/glfw/glfw.git --branch 3.0.4 --depth 1
+        git clone https://github.com/glfw/glfw.git --branch 3.1.1 --depth 1
         mkdir glfw/build && cd glfw/build
         cmake -DBUILD_SHARED_LIBS=ON \
               -DGLFW_BUILD_EXAMPLES=OFF \
@@ -20,9 +23,6 @@ if [ "$TRAVIS_OS_NAME" = "linux" -o -z "$TRAVIS_OS_NAME" ]; then
         make -j4 && make install
     )
 
-    curl http://www.cmake.org/files/v2.8/cmake-2.8.11-Linux-i386.tar.gz \
-        | tar -xz -C $HOME/.local --strip-components=1
-
 elif [ "$TRAVIS_OS_NAME" = "osx" ]; then
     brew tap homebrew/versions
     brew install qt5 glfw3 pkgconfig