uclibc: fix testsuite

Unless the tests are built with TEST_INSTALLED_UCLIBC their rpath will
point to the build directory rather than runtime directory, resulting in
non-executable tests for the target.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/uclibc/uclibc.mk

@@ -386,6 +386,7 @@ ifeq ($(BR2_UCLIBC_INSTALL_TEST_SUITE),y)
 define UCLIBC_BUILD_TEST_SUITE
 	$(MAKE1) -C $(@D) \
 		$(UCLIBC_MAKE_FLAGS) \
+		TEST_INSTALLED_UCLIBC=1 \
 		UCLIBC_ONLY=1 \
 		test_compile
 endef