Fix bashisms in test scripts
diff --git a/tests/scripts/list-symbols.sh b/tests/scripts/list-symbols.sh
index ad3f842..82b6cc9 100755
--- a/tests/scripts/list-symbols.sh
+++ b/tests/scripts/list-symbols.sh
@@ -12,10 +12,10 @@
exit 1
fi
-cp include/mbedtls/config.h{,.bak}
+cp include/mbedtls/config.h include/mbedtls/config.h.bak
scripts/config.pl full
CFLAGS=-fno-asynchronous-unwind-tables make clean lib >/dev/null 2>&1
-mv include/mbedtls/config.h{.bak,}
+mv include/mbedtls/config.h.bak include/mbedtls/config.h
nm -gUj library/libmbedtls.a 2>/dev/null | sed -n -e 's/^_//p' | sort > exported-symbols
make clean