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
    
diff --git a/prebuilts/clang/host/linux-x86 b/prebuilts/clang/host/linux-x86
index 656b9ed..301db30 160000
--- a/prebuilts/clang/host/linux-x86
+++ b/prebuilts/clang/host/linux-x86
@@ -1 +1 @@
-Subproject commit 656b9edc4617162cf5004c5d70d97a99f493d4db
+Subproject commit 301db30368c931330b89db864e4e1fe594307ac9