Add stacked glyph for 'ജ്മ'. Test case 'അജ്മീര്‍'.
Resolves bug http://savannah.nongnu.org/bugs/?39687

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
[Meera] Fix ല്ക്ക mapping

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>