Update git submodules

* Update prebuilts/clang/host/linux-x86 from branch 'master'
  to 301db30368c931330b89db864e4e1fe594307ac9
  - Use 'git' instead of 'svn' suffix.
    
    Bug: 145916209
    Test: build unix target in aosp-clang-tools branch
    Change-Id: I9999583c8508d197f8909d39b376dea6e0646c38
    
1 file changed