Fix mbedtls unit tests

Fix mbedtls unit tests

Commit 674b166 ("Fix build warnings related to get_random()") broke the
unit tests for mbedtls, because <mbedtls/cipher.h> was now included via
platform.c -> crypto.h -> crypto_backend.h, but the crypto cflags were
not included for that unit tests.

Since we got rid of --disable-crypto, we can now fix this by simply always
including the CRYPTO_CFLAGS in the TEST_CFLAGS (and the CRYPTO_LIBS in the
TEST_LDFLAGS). This should not only fix this occurrence, but also prevent
similar problems in the future.

Signed-off-by: Steffan Karger <steffan.karger@fox-it.com>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <1539153883-15789-1-git-send-email-steffan.karger@fox-it.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg17687.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>