buildtools: add helper to convert text file to header

Simple script to read a file and make it into a initialized
C string in a header file.

Signed-off-by: Stephen Hemminger <stephen@networkplumber

buildtools: add helper to convert text file to header

Simple script to read a file and make it into a initialized
C string in a header file.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

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