Adjust llvm7 file list to include passes required for arm target

Change-Id: Ie80381527e9c8672d1a6e57aea78582ccee33021
Repro: external/swiftshader$ mma
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/32109
Tested-by: Chris Forbes <chrisforbes@google.com>
Presubmit-Ready: Chris Forbes <chrisforbes@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
diff --git a/third_party/llvm-7.0/Android.bp b/third_party/llvm-7.0/Android.bp
index def21d0..6d81b91 100644
--- a/third_party/llvm-7.0/Android.bp
+++ b/third_party/llvm-7.0/Android.bp
@@ -754,6 +754,7 @@
         "llvm/lib/Transforms/Scalar/SeparateConstOffsetFromGEP.cpp",
         "llvm/lib/Transforms/Scalar/SROA.cpp",
         "llvm/lib/Transforms/Scalar/SimplifyCFGPass.cpp",
+        "llvm/lib/Transforms/Scalar/LowerAtomic.cpp",
         "llvm/lib/Transforms/Utils/BasicBlockUtils.cpp",
         "llvm/lib/Transforms/Utils/BreakCriticalEdges.cpp",
         "llvm/lib/Transforms/Utils/BuildLibCalls.cpp",