Investigate ldc mangled name warnings

[viniarck]

when building with ldc 1.13.0 there are mangled name overlap warnings, these functions are not core functions, but are important:

source/nvimhost/api.d(718,10): Warning: skipping definition of function nvimhost.api.NvimAPI.tabpageIsValid due to previous definition for the same mangled name: _D8nvimhost3api7NvimAPI1
4tabpageIsValidMFiZb
source/nvimhost/api.d(724,10): Warning: skipping definition of function nvimhost.api.NvimAPI.uiDetach due to previous definition for the same mangled name: _D8nvimhost3api7NvimAPI8uiDeta
chMFZv
source/nvimhost/api.d(730,10): Warning: skipping definition of function nvimhost.api.NvimAPI.uiDetachAsync due to previous definition for the same mangled name: _D8nvimhost3api7NvimAPI13
uiDetachAsyncMFZv