Fix PR 62157: disclean in libsanitizer not working

Fix PR 62157: disclean in libsanitizer not working

So what is happening is DIST_SUBDIRS contains the conditional
directories which is wrong, so we need to force DIST_SUBDIRS
to be the same as SUBDIRS as recommened by the automake manual.

OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.
Also now make distclean works inside libsanitizer directory.

libsanitizer/ChangeLog:

	PR sanitizer/62157
	* Makefile.am: Force DIST_SUBDIRS to be SUBDIRS.
	* Makefile.in: Regenerate.
	* asan/Makefile.in: Likewise.
	* hwasan/Makefile.in: Likewise.
	* interception/Makefile.in: Likewise.
	* libbacktrace/Makefile.in: Likewise.
	* lsan/Makefile.in: Likewise.
	* sanitizer_common/Makefile.in: Likewise.
	* tsan/Makefile.in: Likewise.
	* ubsan/Makefile.in: Likewise.