debug build on travis

Author: krakjoe

travis/ci.sh

@@ -4,6 +4,6 @@ cd php-src/ext
 git clone https://github.com/krakjoe/explain.git
 cd ../
 ./buildconf --force
-./configure --disable-all --enable-explain=static
+./configure --disable-all --enable-debug --enable-explain=static
 make
 TEST_PHP_EXECUTABLE=sapi/cli/php sapi/cli/php run-tests.php ext/explain