tests: Set FIPSLD_CC=gcc (if not set) to make CONFIG_FIPS=y use easier

This makes it easier to build wpa_supplicant for OpenSSL FIPS mode
testing. wpa_supplicant/.config needs following type of configuration
for this:
CONFIG_FIPS=y
CFLAGS += -I/usr/local/ssl/include
LIBS += -L/usr/local/ssl/lib
CC=/usr/local/ssl/fips-2.0/bin/fipsld

Signed-off-by: Jouni Malinen <j@w1.fi>

tests/hwsim/build.sh

@@ -72,4 +72,7 @@ if [ $use_lcov -eq 1 ]; then
 fi
 
 make clean > /dev/null
+if [ -z $FIPSLD_CC ]; then
+export FIPSLD_CC=gcc
+fi
 make QUIET=1 -j8