Remove host prebuilts for Clang 3.3, since we have switched to 3.4.

Change-Id: Ifdf8e77a4de285173a34fdae673e5b4bd469ae36

default.xml

@@ -370,14 +370,12 @@
   <project path="prebuilts/clang/darwin-x86/3.1" name="platform/prebuilts/clang/darwin-x86/3.1" groups="pdk,darwin" />
   <project path="prebuilts/clang/darwin-x86/3.2" name="platform/prebuilts/clang/darwin-x86/3.2" groups="pdk,darwin" />
   <project path="prebuilts/clang/darwin-x86/arm/3.3" name="platform/prebuilts/clang/darwin-x86/arm/3.3" groups="darwin,arm" />
-  <project path="prebuilts/clang/darwin-x86/host/3.3" name="platform/prebuilts/clang/darwin-x86/host/3.3" groups="darwin" />
   <project path="prebuilts/clang/darwin-x86/host/3.4" name="platform/prebuilts/clang/darwin-x86/host/3.4" groups="pdk,darwin" />
   <project path="prebuilts/clang/darwin-x86/mips/3.3" name="platform/prebuilts/clang/darwin-x86/mips/3.3" groups="darwin,mips" />
   <project path="prebuilts/clang/darwin-x86/x86/3.3" name="platform/prebuilts/clang/darwin-x86/x86/3.3" groups="darwin,x86" />
   <project path="prebuilts/clang/linux-x86/3.1" name="platform/prebuilts/clang/linux-x86/3.1" groups="pdk,linux" />
   <project path="prebuilts/clang/linux-x86/3.2" name="platform/prebuilts/clang/linux-x86/3.2" groups="pdk,linux" />
   <project path="prebuilts/clang/linux-x86/arm/3.3" name="platform/prebuilts/clang/linux-x86/arm/3.3" groups="linux,arm" />
-  <project path="prebuilts/clang/linux-x86/host/3.3" name="platform/prebuilts/clang/linux-x86/host/3.3" groups="linux" />
   <project path="prebuilts/clang/linux-x86/host/3.4" name="platform/prebuilts/clang/linux-x86/host/3.4" groups="pdk,linux" />
   <project path="prebuilts/clang/linux-x86/mips/3.3" name="platform/prebuilts/clang/linux-x86/mips/3.3" groups="linux,mips" />
   <project path="prebuilts/clang/linux-x86/x86/3.3" name="platform/prebuilts/clang/linux-x86/x86/3.3" groups="linux,x86" />