Add an environment variable to give the developer an option to disable apt-get usage

After the introduction of the "set -e" option, the build script fails on non debian/ubuntu linux distributions.

This is a quick fix to allow the users of distros other than debian/ubuntu to build the library, not a definitive solution.
The COCOS2DX_USEAPT environment variable can be set in the user shell config or used directly in
the command line: COCOS2DX_USEAPT=false ./make-all-linux-project.sh

make-all-linux-project.sh

@@ -8,32 +8,36 @@
 # Exit of first error.
 set -e
 
-DEPENDS='libx11-dev'
-DEPENDS+=' libxmu-dev'
-DEPENDS+=' libglu1-mesa-dev'
-DEPENDS+=' libgl2ps-dev'
-DEPENDS+=' libxi-dev'
-DEPENDS+=' libglfw-dev'
-DEPENDS+=' g++'
-DEPENDS+=' libzip-dev'
-DEPENDS+=' libcurl4-gnutls-dev'
-DEPENDS+=' libfontconfig1-dev'
-DEPENDS+=' libsqlite3-dev'
-DEPENDS+=' libglew*-dev'
+[ -z "$COCOS2DX_USEAPT" ] && COCOS2DX_USEAPT=true
 
-MISSING=
-echo "Checking for missing packages ..."
-for i in $DEPENDS; do
-    if ! dpkg-query -W --showformat='${Status}\n' $i | grep "install ok installed" > /dev/null; then
-        MISSING+="$i "
+if $COCOS2DX_USEAPT; then
+    DEPENDS='libx11-dev'
+    DEPENDS+=' libxmu-dev'
+    DEPENDS+=' libglu1-mesa-dev'
+    DEPENDS+=' libgl2ps-dev'
+    DEPENDS+=' libxi-dev'
+    DEPENDS+=' libglfw-dev'
+    DEPENDS+=' g++'
+    DEPENDS+=' libzip-dev'
+    DEPENDS+=' libcurl4-gnutls-dev'
+    DEPENDS+=' libfontconfig1-dev'
+    DEPENDS+=' libsqlite3-dev'
+    DEPENDS+=' libglew*-dev'
+
+    MISSING=
+    echo "Checking for missing packages ..."
+    for i in $DEPENDS; do
+        if ! dpkg-query -W --showformat='${Status}\n' $i | grep "install ok installed" > /dev/null; then
+            MISSING+="$i "
+        fi
+    done
+
+    if [ -n "$MISSING" ]; then
+        TXTCOLOR_DEFAULT="\033[0;m"
+        TXTCOLOR_GREEN="\033[0;32m"
+        echo -e $TXTCOLOR_GREEN"Missing packages: $MISSING.\nYou may be asked for your password for package installation."$TXTCOLOR_DEFAULT
+        sudo apt-get --force-yes --yes install $MISSING
     fi
-done
-
-if [ -n "$MISSING" ]; then
-    TXTCOLOR_DEFAULT="\033[0;m"
-    TXTCOLOR_GREEN="\033[0;32m"
-    echo -e $TXTCOLOR_GREEN"Missing packages: $MISSING.\nYou may be asked for your password for package installation."$TXTCOLOR_DEFAULT
-    sudo apt-get --force-yes --yes install $MISSING
 fi
 
 # Change directory to the location of this script