package: enable everything possible in ArchLinux PKGBUILD.

Not enabling optional Platform classes, as they would introduce
additional dependencies.

package/archlinux/magnum-git/PKGBUILD

@@ -39,9 +39,17 @@ build() {
     cmake ../$_gitname \
         -DCMAKE_BUILD_TYPE=Release \
         -DCMAKE_INSTALL_PREFIX=/usr \
+        -DWITH_AUDIO=ON \
         -DWITH_GLUTAPPLICATION=ON \
         -DWITH_GLXAPPLICATION=ON \
         -DWITH_WINDOWLESSGLXAPPLICATION=ON \
+        -DWITH_MAGNUMFONT=ON \
+        -DWITH_MAGNUMFONTCONVERTER=ON \
+        -DWITH_TGAIMAGECONVERTER=ON \
+        -DWITH_TGAIMPORTER=ON \
+        -DWITH_WAVAUDIOIMPORTER=ON \
+        -DWITH_DISTANCEFIELDCONVERTER=ON \
+        -DWITH_FONTCONVERTER=ON \
         -DWITH_MAGNUMINFO=ON
     make
 }