Andrew Bettison 68deae8393 Improve out-of-tree build support
Use the conventional autoconf @srcdir@ substitution instead of requiring
the SOURCE_PREFIX variable to be passed to the Makefile.

Also support running test scripts in an out-of-tree build directory.
2017-10-23 17:51:42 +10:30
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2017-10-23 17:51:42 +10:30