New test strategy document: invasive testing

Evaluate possible approaches for invasive testing.

State some rules.

This commit was originally written for Mbed Crypto only.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/docs/architecture/Makefile b/docs/architecture/Makefile
index ab22fb1..d8db2e0 100644
--- a/docs/architecture/Makefile
+++ b/docs/architecture/Makefile
@@ -5,6 +5,7 @@
 all_markdown = \
 	       mbed-crypto-storage-specification.md \
 	       testing/driver-interface-test-strategy.md \
+	       testing/invasive-testing.md \
 	       testing/test-framework.md \
 	       # This line is intentionally left blank
 
@@ -22,3 +23,4 @@
 
 clean:
 	rm -f *.html *.pdf
+	rm -f testing/*.html testing/*.pdf