libtomcrypt: remove useless #if 1

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Fix build error when CFG_CRYPTO_{MD5,SHA{1,224,256,384,512}}=n

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Travis: build with some crypto algorithms disabled

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
libtomcrypt: do not perform partial link with --gc-sections

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>