Add missing LLVM 7.0 source files

Fixes linking for MSVC build.

Bug b/115344057

Change-Id: I9a38d987f0cf8c20c670ccdb1c38dd49681bb941
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/27968
Presubmit-Ready: Nicolas Capens <nicolascapens@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index b91dc7e..06c71ac 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -784,6 +784,9 @@
     ${LLVM_DIR}/lib/Analysis/ValueLatticeUtils.cpp
     ${LLVM_DIR}/lib/Analysis/ValueTracking.cpp
     ${LLVM_DIR}/lib/Analysis/VectorUtils.cpp
+    ${LLVM_DIR}/lib/AsmParser/LLLexer.cpp
+    ${LLVM_DIR}/lib/AsmParser/LLParser.cpp
+    ${LLVM_DIR}/lib/AsmParser/Parser.cpp
     ${LLVM_DIR}/lib/BinaryFormat/Dwarf.cpp
     ${LLVM_DIR}/lib/BinaryFormat/Magic.cpp
     ${LLVM_DIR}/lib/BinaryFormat/Wasm.cpp