Ship check-ppr in bindist and compile during testsuite run
check-ppr is built during the compiler build and used by the testsuite in the pretty-printer tests. In a source checkout this is fine, however this arrangement blows up in the case of a binary distribution as we don't (and probably shouldn't) ship the
check-ppr binary in the bindist.
I think the most reasonable way to deal with this is to instead ship the
check-ppr source (perhaps in the testsuite tarball) and build it as a dependency of the testsuite. Ideally we would build the executable once and use it for each of the ppr tests.