Add some required packages to tools/install_dependencies.sh

https://skia.org/user/quick/linux

I added following to build skia library.
* freeglut3-dev
* libglu1-mesa-dev
* libosmesa6-dev

Minor:
* fix indent
* sort package list in alphabetical order

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2303733003

Review-Url: https://codereview.chromium.org/2303733003
diff --git a/tools/install_dependencies.sh b/tools/install_dependencies.sh
index 037b894..fd5c366 100755
--- a/tools/install_dependencies.sh
+++ b/tools/install_dependencies.sh
@@ -26,24 +26,26 @@
         Ubuntu)
             PACKAGES=$(cat<<-EOF
 		build-essential
-		libfreetype6-dev
+		freeglut3-dev
 		libfontconfig-dev
-		libpng12-dev
+		libfreetype6-dev
 		libgif-dev
+		libglu1-mesa-dev
+		libosmesa6-dev
+		libpng12-dev
 		libqt4-dev
 		EOF
             )
            if [ $(lsb_release -r -s) = '14.04' ] ; then
                PACKAGES="${PACKAGES} ninja-build"
-            fi
-            if ! dpkg_all_installed $PACKAGES; then
-                sudo apt-get install $PACKAGES
-            fi
-            exit
-            ;;
+           fi
+           if ! dpkg_all_installed $PACKAGES; then
+               sudo apt-get install $PACKAGES
+           fi
+           exit
+           ;;
     esac
 fi
 
 echo 'unknown system'
 exit 1
-