Add GCC 4.9 for aarch64.
diff --git a/default.xml b/default.xml
index 8ac677a..d182135 100644
--- a/default.xml
+++ b/default.xml
@@ -390,6 +390,7 @@
   <project path="prebuilts/eclipse-build-deps" name="platform/prebuilts/eclipse-build-deps" groups="notdefault,eclipse" />
   <project path="prebuilts/eclipse-build-deps-sources" name="platform/prebuilts/eclipse-build-deps-sources" groups="notdefault,eclipse" />
   <project path="prebuilts/gcc/darwin-x86/aarch64/aarch64-linux-android-4.8" name="platform/prebuilts/gcc/darwin-x86/aarch64/aarch64-linux-android-4.8" groups="pdk,darwin,arm" />
+  <project path="prebuilts/gcc/darwin-x86/aarch64/aarch64-linux-android-4.9" name="platform/prebuilts/gcc/darwin-x86/aarch64/aarch64-linux-android-4.9" groups="pdk,darwin,arm" />
   <project path="prebuilts/gcc/darwin-x86/arm/arm-eabi-4.6" name="platform/prebuilts/gcc/darwin-x86/arm/arm-eabi-4.6" groups="pdk,darwin,arm" />
   <project path="prebuilts/gcc/darwin-x86/arm/arm-eabi-4.7" name="platform/prebuilts/gcc/darwin-x86/arm/arm-eabi-4.7" groups="pdk,darwin,arm" />
   <project path="prebuilts/gcc/darwin-x86/arm/arm-eabi-4.8" name="platform/prebuilts/gcc/darwin-x86/arm/arm-eabi-4.8" groups="pdk,darwin,arm" />
@@ -407,6 +408,7 @@
   <project path="prebuilts/gcc/darwin-x86/x86/x86_64-linux-android-4.7" name="platform/prebuilts/gcc/darwin-x86/x86/x86_64-linux-android-4.7" groups="pdk,darwin,x86" />
   <project path="prebuilts/gcc/darwin-x86/x86/x86_64-linux-android-4.8" name="platform/prebuilts/gcc/darwin-x86/x86/x86_64-linux-android-4.8" groups="pdk,darwin,x86" />
   <project path="prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.8" name="platform/prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.8" groups="pdk,linux,arm" />
+  <project path="prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9" name="platform/prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9" groups="pdk,linux,arm" />
   <project path="prebuilts/gcc/linux-x86/arm/arm-eabi-4.6" name="platform/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6" groups="pdk,linux,arm" />
   <project path="prebuilts/gcc/linux-x86/arm/arm-eabi-4.7" name="platform/prebuilts/gcc/linux-x86/arm/arm-eabi-4.7" groups="pdk,linux,arm" />
   <project path="prebuilts/gcc/linux-x86/arm/arm-eabi-4.8" name="platform/prebuilts/gcc/linux-x86/arm/arm-eabi-4.8" groups="pdk,linux,arm" />