Log Message:
Update m17n-db to 1.7.0.

* Changes in the m17n database 1.7.0

** New input methods are added.

ar-translit.mim: Arabic input method based on Roman transliteration.

latn1-pre.mim: Latin input method simulating "US International Keyboard".

ssymbol.mim, lsymbol.mim: Input method for various symbols.

** A new global variable is added.

fallback-input-method: Comma separated fallback input method names.

* Changes in the m17n database 1.6.5

** All input methods in the m17n contrib package are merged.

** New input methods are added.

sa-itrans.mim: Sanskrit input method with ITRANS method

ml-remington.mim: Malayalam input method.