Vixl: Make test compilation dependent on host 64b build
Vixl: Make test compilation dependent on host 64b build

Change-Id: I2c9a5fdbe9ea9d7e76ceab227b27d90f32a585a3

geekboxzone/lollipop_external_vixl,CyanogenMod/android_external_vixl,geekboxzone/mmallow_external_vixl,xin3liang/platform_external_vixl,geekboxzone/lollipop_external_vixl,geekboxzone/mmallow_external_vixl,android-ia/platform_external_vixl,android-ia/platform_external_vixl,android-ia/platform_external_vixl,CyanogenMod/android_external_vixl,xin3liang/platform_external_vixl,CyanogenMod/android_external_vixl,geekboxzone/mmallow_external_vixl,xin3liang/platform_external_vixl,geekboxzone/lollipop_external_vixl