tests: move to subdir, move to meson

De-clutter the source directories a bit. Ensure tests build with meson, and
remove from autotools in a few places (no need to do things twice).

lib/tests/testdir2/wom_bat/cur/rfc822.2

@@ -0,0 +1,44 @@
+From: dwarf@siblings.net
+To: root@eruditorum.org
+Subject: Fwd: test abc
+References: <8639ddr9wu.fsf@cthulhu.djcbsoftware>
+User-agent: mu 0.98pre; emacs 24.0.91.9
+Date: Thu, 24 Nov 2011 14:24:00 +0200
+Message-ID: <861usxr9nj.fsf@cthulhu.djcbsoftware>
+Content-Type: multipart/mixed; boundary="=-=-="
+MIME-Version: 1.0
+
+--=-=-=
+Content-Type: text/plain
+
+Saw the website. Am willing to stipulate that you are not RIST 9E03. Suspect
+that you are the Dentist, who yearns for honest exchange of views. Anonymous,
+digitally signed e-mail is the only safe vehicle for same.
+
+If you want me to believe you are not the Dentist, provide plausible
+explanation for your question regarding why we are building the Crypt.
+
+Yours truly,
+
+--=-=-=
+Content-Type: message/rfc822
+Content-Disposition: inline; filename=
+	"1322137188_3.11919.foo:2,S"
+Content-Description: rfc822
+
+From: dwarf@siblings.net
+To: root@eruditorum.org
+Subject: test abc	
+User-agent: mu 0.98pre; emacs 24.0.91.9
+Date: Thu, 24 Nov 2011 14:18:25 +0200
+Message-ID: <8639ddr9wu.fsf@cthulhu.djcbsoftware>
+Content-Type: text/plain
+MIME-Version: 1.0
+
+As I stepped on this unknown middle-aged Filipina's feet during an ill-advised
+ballroom dancing foray, she leaned close to me and uttered some latitude and
+longitude figures with a conspicuously large number of significant digits of
+precision, implying a maximum positional error on the order of the size of a
+dinner plate. Gosh, was I ever curious!
+
+--=-=-=--