* generateVersion.sh: move cp(1) flags before arguments
POSIX and BSD cp(1) don't support flags after arguments e.g.,
cp: -fr is not a directory
* generateVersion.sh: switch to sed(1) -i for better compatibility
On BSDs awk is usually The One True Awk thus doesn't support `-i inplace`.
awk: unknown option -i ignored
awk: can't open file {sub(/@HASH@/,"1234567890abcdef")}1
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