Remove superfluous OpenSSL include paths.

The libcrypto and libssl modules (and their respective static and host
versions) use LOCAL_EXPORT_C_INCLUDE_DIRS thus just including the module
is sufficient.

Change-Id: I9030a3747b8a1f18acd0308746cb2f63d4123f8b
diff --git a/tests/keymaster/Android.mk b/tests/keymaster/Android.mk
index c420db9..0c11795 100644
--- a/tests/keymaster/Android.mk
+++ b/tests/keymaster/Android.mk
@@ -6,9 +6,6 @@
 LOCAL_SRC_FILES:= \
     keymaster_test.cpp
 
-LOCAL_C_INCLUDES := \
-    external/openssl/include \
-
 LOCAL_SHARED_LIBRARIES := \
     liblog \
     libutils \