Replaces libpcre with libpcre2

libpcre was removed and libpcre2 10.21 was added instead.

The files of the c++ wrapper library, libpcrecpp, were moved to
their own directory, pcrecpp. As of this patch pcrecpp is broken
due to the missing dependency libpcre. The port will be added in
a subsequent commit to better document the changes made.

Bug: 24091652
Change-Id: Iac638baa545470596cc764271ae94d6b95ebede8
diff --git a/dist2/testdata/testinput16 b/dist2/testdata/testinput16
new file mode 100644
index 0000000..8a48207
--- /dev/null
+++ b/dist2/testdata/testinput16
@@ -0,0 +1,9 @@
+# This test is run only when JIT support is not available. It checks that an
+# attempt to use it has the expected behaviour. It also tests things that
+# are different without JIT.
+
+/abc/I,jit,jitverify
+
+/a*/I
+
+# End of testinput16