external/jpeg-turbo: pass (debug) CFLAGS into external build process

Change-Id: I51db4784135be1d66f3fede5f87fcb5cd786fbc9
diff --git a/external/jpeg-turbo/ExternalProject_jpeg-turbo.mk b/external/jpeg-turbo/ExternalProject_jpeg-turbo.mk
index c913d70..5809ff2 100644
--- a/external/jpeg-turbo/ExternalProject_jpeg-turbo.mk
+++ b/external/jpeg-turbo/ExternalProject_jpeg-turbo.mk
@@ -32,6 +32,7 @@ $(call gb_ExternalProject_get_state_target,jpeg-turbo,configure) :
			--with-jpeg8 \
			--without-java \
			--without-turbojpeg \
			CFLAGS='$(if $(debug),$(gb_DEBUG_CFLAGS),$(gb_COMPILEROPTFLAGS))' \
	)

# vim: set noet sw=4 ts=4: