Nicolass Iooss reports that when building with "clang -Wwrite-strings",
the compiler complains about initializing the char* array
genhomedirconargv with literal strings.
Make genhomedirconargv an array of pointers to const char and cast it
as non-const when assigning it to argv.
Signed-off-by: James Carter <jwcart2@tycho.nsa.gov>
1f312a9247