build: Move TCTI code from tcti/ to src/tss2-tcti/

Minor fixups were required to 'include' statements in a few test cases
as well as the pkgconfig files.

Signed-off-by: Philip Tricca <philip.b.tricca@intel.com>
diff --git a/test/unit/tcti-device.c b/test/unit/tcti-device.c
index 14c9509..93a90b7 100644
--- a/test/unit/tcti-device.c
+++ b/test/unit/tcti-device.c
@@ -7,7 +7,7 @@
 
 #include "tss2_mu.h"
 #include "tss2_tcti_device.h"
-#include "tcti/tcti.h"
+#include "tss2-tcti/tcti.h"
 
 /**
  * When passed all NULL values ensure that we get back the expected RC