This way, building the minsrc tarball doesn't require multiple versions
of Automake to be installed. (Most things were at the 1.11 version, but
some were at the 1.14 version.)
Building minsrc should now work just fine.
The automake manual says: "the contents of a non-empty AM_TESTS_ENVIRONMENT
must be terminated by a semicolon." Without the semicolon, the perl command
will indefinitely wait for input from stdin.
