[gn build] Port 28b01c59c93d

Author: llvmgnsyncbot

llvm/utils/gn/secondary/clang/lib/Headers/BUILD.gn

@@ -145,9 +145,13 @@ copy("Headers") {
     "fmaintrin.h",
     "fxsrintrin.h",
     "gfniintrin.h",
+    "hexagon_circ_brev_intrinsics.h",
+    "hexagon_protos.h",
+    "hexagon_types.h",
     "hresetintrin.h",
     "htmintrin.h",
     "htmxlintrin.h",
+    "hvx_hexagon_protos.h",
     "ia32intrin.h",
     "immintrin.h",
     "intrin.h",