package/earlyoom: unhardcode package version in CFLAGS

'earlyoom --help' still says 'earlyoom 1.6' though it's already
version 1.7. '-DVERSION' flag value should be either unhardcoded,
either updated with each package version bump.

Signed-off-by: Sergey Bobrenok <SIBobrenok@sberdevices.ru>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 239dd7dcbda1b2c86a29491158fa089e06efca33)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/earlyoom/earlyoom.mk

@@ -11,7 +11,7 @@ EARLYOOM_LICENSE_FILES = LICENSE
 
 EARLYOOM_BUILD_TARGETS = earlyoom.service earlyoom
 EARLYOOM_INSTALL_TARGETS = install-default install-bin
-EARLYOOM_CFLAGS = '$(TARGET_CFLAGS) -std=gnu99 -DVERSION=\"1.6\"'
+EARLYOOM_CFLAGS = '$(TARGET_CFLAGS) -std=gnu99 -DVERSION=\"$(EARLYOOM_VERSION)\"'
 
 EARLYOOM_MAKE_OPTS = \
 	$(TARGET_CONFIGURE_OPTS) \