Update php c extension version number.

php/ext/google/protobuf/package.xml

@@ -13,8 +13,8 @@
  <date>2017-01-13</date>
  <time>16:06:07</time>
  <version>
-  <release>3.3.2</release>
-  <api>3.3.0</api>
+  <release>3.4.0</release>
+  <api>3.4.0</api>
  </version>
  <stability>
   <release>stable</release>
@@ -133,6 +133,22 @@ GA release.
    <time>15:33:07</time>
    <license uri="https://opensource.org/licenses/BSD-3-Clause">3-Clause BSD License</license>
    <notes>
+GA release.
+   </notes>
+  </release>
+  <release>
+   <version>
+    <release>3.4.0</release>
+    <api>3.4.0</api>
+   </version>
+   <stability>
+    <release>stable</release>
+    <api>stable</api>
+   </stability>
+   <date>2017-08-16</date>
+   <time>15:33:07</time>
+   <license uri="https://opensource.org/licenses/BSD-3-Clause">3-Clause BSD License</license>
+   <notes>
 GA release.
    </notes>
   </release>

php/ext/google/protobuf/protobuf.h

@@ -37,7 +37,7 @@
 #include "upb.h"
 
 #define PHP_PROTOBUF_EXTNAME "protobuf"
-#define PHP_PROTOBUF_VERSION "3.3.2"
+#define PHP_PROTOBUF_VERSION "3.3.4"
 
 #define MAX_LENGTH_OF_INT64 20
 #define SIZEOF_INT64 8