build: add new test configuration for aarch32 qemu build using clang

adds new test configuration which builds aarch32 TF-A for qemu platform
using clang

Change-Id: Id2ca74574eed76b6b071d713120035e5657d373c
diff --git a/tf_config/qemu-aarch32-clang-opteed b/tf_config/qemu-aarch32-clang-opteed
new file mode 100644
index 0000000..ddd1dea
--- /dev/null
+++ b/tf_config/qemu-aarch32-clang-opteed
@@ -0,0 +1,5 @@
+AARCH32_SP=optee
+ARCH=aarch32
+ARM_ARCH_MAJOR=7
+CC=clang
+PLAT=qemu