[CUDA] Include single GPU binary, NFCI.

Binaries for multiple architectures are combined by fatbinary,
so the current code was effectively not needed.

Differential Revision: https://reviews.llvm.org/D43461

llvm-svn: 326342
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 4be390b..a217d35 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1046,8 +1046,8 @@
                       Args.getAllArgValues(OPT_fsanitize_trap_EQ), Diags,
                       Opts.SanitizeTrap);
 
-  Opts.CudaGpuBinaryFileNames =
-      Args.getAllArgValues(OPT_fcuda_include_gpubinary);
+  Opts.CudaGpuBinaryFileName =
+      Args.getLastArgValue(OPT_fcuda_include_gpubinary);
 
   Opts.Backchain = Args.hasArg(OPT_mbackchain);