Add repos for x86 support.

Bug: 115929667
Change-Id: Icea0d416108e44d1c5f080c7bcd89ca79e7891fa
diff --git a/default.xml b/default.xml
index 0ece246..e7762eb 100644
--- a/default.xml
+++ b/default.xml
@@ -39,6 +39,7 @@
   <!-- BEGIN trusty device projects -->
   <project path="trusty/device/arm/generic-arm64" name="trusty/device/arm/generic-arm64" groups="trusty" />
   <project path="trusty/device/arm/vexpress-a15" name="trusty/device/arm/vexpress-a15" groups="trusty" />
+  <project path="trusty/device/x86/generic-x86_64" name="trusty/device/x86/generic-x86_64" groups="trusty" />
   <!-- END trusty device projects -->
 
   <!-- BEGIN trusty nxp projects -->
@@ -58,6 +59,7 @@
   <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="trusty" />
   <project path="prebuilts/gcc/linux-x86/arm/arm-eabi-4.8" name="platform/prebuilts/gcc/linux-x86/arm/arm-eabi-4.8" groups="trusty" />
   <project path="prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9" name="platform/prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9" groups="trusty" />
+  <project path="prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.9" name="platform/prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.9" groups="trusty" clone-depth="1" />
   <project path="prebuilts/clang/host/linux-x86" name="platform/prebuilts/clang/host/linux-x86" groups="trusty" />
   <project path="prebuilts/libprotobuf" name="platform/prebuilts/libprotobuf/linux" revision="trusty" groups="trusty" />
   <!-- END toolchains -->