Khmer and Lao fonts have spurious tables

[GoogleCodeExporter]

Listed below are spurious tables (in that they're NOT necessary for 
'run-time'). 

* Khmer/Hinted/NotoSansKhmer-Regular : TSI[0-3,5]
* Khmer/Hinted/NotoSerifKhmer* : morx  : Hinted fonts do not need morx

* Khmer/Unhinted/*Sans*  : TSI[P,S,V] 
* Lao/Hinted 
    NotoSansLao-{Regular,Bold} : TSIV
    NotoSansUILao-Regular : TSIV
    All fonts : morx 
* Lao/Unhinted
    All fonts : TSI{V,P,S,D}

All fonts have FFTM table : 28 bytes
Some fonts have Pfed table : ~100 bytes

I removed TSI[P,S,V] successfully with VOLT and they work on Windows. (when I 
used ttx to remove them, they didn't work on Windows). 

However, TSI[0-3,5] tables are problematic. They're not VOLT tables and 
removing them with ttx led them not to work properly on Windows. 

Original issue reported on code.google.com by jungs...@google.com on 26 Apr 2013 at 8:33

[GoogleCodeExporter]

Original comment by roozbeh@google.com on 26 Dec 2013 at 9:00

[GoogleCodeExporter]

This should be fixed in 44cb04cd62bf, except for the morx table, which is used 
in AAT.

Original comment by roozbeh@google.com on 18 Jul 2014 at 5:24

• Changed state: Fixed

[behdad]

cc @jungshik @xiangyexiao