xdebug: fix for S != B

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-webserver/recipes-php/xdebug/xdebug_2.2.3.bb

@@ -15,7 +15,9 @@ inherit autotools
 EXTRA_OECONF += "--enable-xdebug -with-php-config=${STAGING_BINDIR_CROSS}/php-config"
 
 do_configure() {
+    cd ${S}
     ${STAGING_BINDIR_CROSS}/phpize
+    cd ${B}
 
     # Running autoreconf as autotools_do_configure would do here
     # breaks the libtool configuration resulting in a failure later