Added energest example to regression compile tests

tests/01-compile-base/Makefile

@@ -7,6 +7,8 @@ hello-world/sky \
 storage/eeprom-test/native \
 multicast/sky \
 libs/logging/native \
+libs/energest/native \
+libs/energest/sky \
 rpl-udp/sky \
 rpl-border-router/native \
 rpl-border-router/sky \

tests/02-compile-arm-ports/Makefile

@@ -52,6 +52,7 @@ libs/logging/zoul \
 6tisch/sixtop/zoul \
 http-socket/zoul \
 libs/timers/zoul \
+libs/energest/zoul \
 libs/trickle-library/zoul \
 nullnet/zoul \
 slip-radio/zoul \