package/mdadm: quote TARGET_LDFLAGS

Fixes:
 - http://autobuild.buildroot.net/results/4a6/4a692e5aa5ac5cb409282a69f664c35611101b32

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/mdadm/mdadm.mk

@@ -21,7 +21,7 @@ MDADM_BUILD_OPTS = \
 	CXFLAGS="$(MDADM_CXFLAGS)" \
 	CPPFLAGS="$(TARGET_CPPFLAGS) -DBINDIR=\\\"/sbin\\\"" \
 	CHECK_RUN_DIR=0 \
-	LDFLAGS=$(TARGET_LDFLAGS)
+	LDFLAGS="$(TARGET_LDFLAGS)"
 
 MDADM_INSTALL_TARGET_OPTS = install-bin