Well, look at 

luatexdir/luaharfbuzz 

I have also used 

to check 

%% test2-latex.tex

\documentclass{article}
\usepackage{fontspec}
\newfontfamily\deva[Script=Devanagari]{NotoSansDevanagari-Regular.ttf}
\newfontfamily\beng[Script=Bengali]{NotoSansBengali-Regular.ttf}
\newfontfamily\guru[Script=Gurmukhi]{NotoSansGurmukhi-Regular.ttf}
\newfontfamily\gujr[Script=Gujarati]{NotoSansGujarati-Regular.ttf}
\newfontfamily\orya[Script=Oriya]{NotoSansOriya-Regular.ttf}
\newfontfamily\taml[Script=Tamil]{NotoSansTamil-Regular.ttf}
\newfontfamily\telu[Script=Telugu]{NotoSansTelugu-Regular.ttf}
\newfontfamily\knda[Script=Kannada]{NotoSansKannada-Regular.ttf}
\newfontfamily\mlym[Script=Malayalam]{NotoSansMalayalam-Regular.ttf}
\newfontfamily\sinh[Script=Sinhala]{NotoSansSinhala-Regular.ttf}

\begin{document}
{\deva क्रर्कि} % krarki
{\beng ক্রর্কি} % krarki
{\guru ਕ੍ਰਰ੍ਕਿ} % krarki
{\gujr ક્રર્કિ} % krarki
{\orya କ୍ରର୍କି} % krarki
{\taml கோ} % ko
{\telu క్రర్కి} % krarki
{\knda ಕ್ರರ್ಕಿ} % krarki
{\mlym ക്രര്കി} % krarki
{\sinh කෙ} % ke
\end{document}

from 

I have renamed luatex 1.11.0 luatex-hb, build the lualatex format 

 luatex-hb --ini '\input lualatex\dump

and run 

 luatex-hb -fmt=lualatex.fmt  test2-latex.tex