uclibc-ng-test: pass LDFLAGS while building

When static linking is in use we need to pass -static while
linking.

Fixes:
  http://autobuild.buildroot.net/results/37ca35854a36fab1690f6ae789e338a1e55307f6

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

package/uclibc-ng-test/uclibc-ng-test.mk

@@ -39,6 +39,7 @@ define UCLIBC_NG_TEST_BUILD_CMDS
 	$(TARGET_MAKE_ENV) $(UCLIBC_NG_TEST_MAKE_ENV) $(MAKE) -C $(@D) \
 		CC="$(TARGET_CC)" \
 		UCLIBC_EXTRA_CFLAGS="$(TARGET_CFLAGS)" \
+		UCLIBC_EXTRA_LDFLAGS="$(TARGET_LDFLAGS)" \
 		test_compile
 	$(TARGET_MAKE_ENV) $(UCLIBC_NG_TEST_MAKE_ENV) $(MAKE1) -C $(@D) \
 		CC="$(TARGET_CC)" \