Use a variable of static storage duration to reference an intentionally
leaked variable. A static data area is in the GC-set of various leak
checkers.
This fixes 3 check-lldb-shell tests in a -DLLVM_USE_SANITIZER={Leaks,Address} build,
e.g. test/Shell/Reproducer/TestHomeDir.test
This is no longer a leak (at least in the technical sense of "never freed, but also never inaccessible). Either remove this comment, or figure out if this is a load-bearing leak :)