feat(v8): add llvm-libc to V8 deps

Keep only the folders that are needed at the moment

Refs: https://chromium-review.googlesource.com/c/v8/v8/+/7828379

Author: targos

lib/update-v8/constants.js

@@ -47,6 +47,14 @@ const highwayIgnore = `/third_party/highway/src/*
 const dragonboxIgnore = `/third_party/dragonbox/src/*
 !/third_party/dragonbox/src/include`;
 
+const llvmLibcIgnore = `/third_party/llvm-libc/src/*
+!/third_party/llvm-libc/src/hdr
+!/third_party/llvm-libc/src/include
+!/third_party/llvm-libc/src/shared
+!/third_party/llvm-libc/src/src
+/third_party/llvm-libc/src/src/*
+!/third_party/llvm-libc/src/src/__support`;
+
 export const v8Deps = [
   {
     name: 'trace_event',
@@ -146,4 +154,13 @@ export const v8Deps = [
     },
     since: 138
   },
+  {
+    name: 'llvm-libc',
+    repo: 'third_party/llvm-libc/src',
+    gitignore: {
+      match: '/third_party/llvm-libc/src',
+      replace: llvmLibcIgnore
+    },
+    since: 150
+  },
 ];