tools: cmake: use different approach for passing LDFLAGS

Funnel the required LDFLAGS environment through HOST_CONFIGURE_CMD for now
as the HOST_CONFIGURE_VARS semantics are completely broken.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

tools/cmake/Makefile

@@ -19,10 +19,12 @@ HOST_CONFIGURE_PARALLEL:=1
 
 include $(INCLUDE_DIR)/host-build.mk
 
-HOST_CONFIGURE_CMD := MAKEFLAGS="$(HOST_JOBS)" $(BASH) ./configure
+HOST_CONFIGURE_CMD := \
+	MAKEFLAGS="$(HOST_JOBS)" \
+	LDFLAGS="$$$$(pkg-config --static --libs libcrypto)" \
+		$(BASH) ./configure
 
-HOST_CONFIGURE_VARS := \
-	LDFLAGS="$$$$(pkg-config --static --libs libcrypto)"
+HOST_CONFIGURE_VARS :=
 
 HOST_CONFIGURE_ARGS := \
 	--prefix=$(STAGING_DIR_HOST)