[Bug sanitizer/62157] make distclean error when libsanitizer is configured not to build 'tsan'

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62157

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Seems like automake bug to me, all this DIST_SUBDIRS vs. SUBDIRS and
am__recursive_targets stuff comes from it.