Move RISCV env. var. setting interal to scripts

.github/scripts/build-extra-tests.sh

@@ -3,13 +3,13 @@
 # turn echo on and error on earliest command
 set -ex
 
-export RISCV="$GITHUB_WORKSPACE/riscv-tools-install"
-export LD_LIBRARY_PATH="$RISCV/lib"
-export PATH="$RISCV/bin:$PATH"
-
 # get shared variables
 SCRIPT_DIR="$( cd "$( dirname "$0" )" && pwd )"
 source $SCRIPT_DIR/defaults.sh
 
+export RISCV="$GITHUB_WORKSPACE/riscv-tools-install"
+export LD_LIBRARY_PATH="$RISCV/lib"
+export PATH="$RISCV/bin:$PATH"
+
 make -C $LOCAL_CHIPYARD_DIR/tests clean
 make -C $LOCAL_CHIPYARD_DIR/tests