Fix the gdb path for NDK-r8b.

content/shell/android/java/content_shell_apk.xml

Index: content/shell/android/java/content_shell_apk.xml
diff --git a/content/shell/android/java/content_shell_apk.xml b/content/shell/android/java/content_shell_apk.xml
index 9b2a6740ce8df1a53a241177069d9daf85fccb8f..d2bcee72cf95b2473a9a501504b50fd9e8c7fdfe 100644
--- a/content/shell/android/java/content_shell_apk.xml
+++ b/content/shell/android/java/content_shell_apk.xml
@@ -17,7 +17,7 @@
   <property name="gen.absolute.dir" value="${out.dir}/gen"/>
   <property name="jar.libs.dir" value="${out.dir}/java/libs"/>
   <path id="native.libs.gdbserver">
-    <fileset file="${toolchain.dir}/../../gdbserver"/>
+    <fileset file="${android.gdbserver}"/>
   </path>
   <property name="native.libs.absolute.dir" location="${out.dir}/libs"/>
   <property name="asset.absolute.dir" location="${out.dir}/assets"/>