eclair/build-tfa.sh: Pass tf_config options as arguments to make

As TF-A's makefile can't accept some option from environment (e.g., it
forcibly overrides ARCH).

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: Iac1ee0d2509bc9d2574277b2985ede426d68cef4
diff --git a/eclair/build-tfa.sh b/eclair/build-tfa.sh
index 58b514f..29732c6 100755
--- a/eclair/build-tfa.sh
+++ b/eclair/build-tfa.sh
@@ -11,4 +11,4 @@
 
 cd ${WORKSPACE}/trusted-firmware-a
 make clean
-make ${MAKE_TARGET} -j3
+make ${MAKE_TARGET} -j3 $(cat ${WORKSPACE}/tf-a-ci-scripts/tf_config/$1)