target-finalize: do not strip libthread_db.so

For proper threading debug support, the libthread_db.so library cannot
be stripped on the target.  This is because the target gdbserver will
also load up this library at runtime and poke around its symbols.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

Makefile

@@ -418,7 +418,8 @@ ifneq ($(BR2_HAVE_DOCUMENTATION),y)
 	rm -rf $(TARGET_DIR)/usr/share/gtk-doc
 	-rmdir $(TARGET_DIR)/usr/share 2>/dev/null
 endif
-	find $(TARGET_DIR) -type f -perm +111 | xargs $(STRIPCMD) 2>/dev/null || true
+	find $(TARGET_DIR) -type f -perm +111 '!' -name 'libthread_db.so*' | \
+		xargs $(STRIPCMD) 2>/dev/null || true
 	find $(TARGET_DIR)/lib/modules -type f -name '*.ko' | \
 		xargs -r $(STRIPCMD) $(STRIP_STRIP_UNNEEDED)