[gn build] Port 2fb1f03

Author: llvmgnsyncbot

llvm/utils/gn/secondary/llvm/lib/Transforms/Vectorize/BUILD.gn

@@ -18,6 +18,7 @@ static_library("Vectorize") {
     "SandboxVectorizer/Interval.cpp",
     "SandboxVectorizer/Legality.cpp",
     "SandboxVectorizer/Passes/BottomUpVec.cpp",
+    "SandboxVectorizer/Passes/RegionsFromBBs.cpp",
     "SandboxVectorizer/Passes/RegionsFromMetadata.cpp",
     "SandboxVectorizer/Passes/SeedCollection.cpp",
     "SandboxVectorizer/Passes/TransactionAcceptOrRevert.cpp",