Add avx2 sources to GN build file

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 18d41f2f479fee2c22bf0de7d6f262e0277a22a3..45eecb640340188604ca1dd063415fda23df880a 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -127,6 +127,20 @@ static_library("libvpx_intrinsics_sse4_1") {
   }
 }
 
+static_library("libvpx_intrinsics_avx2") {
+  configs += [ ":libvpx_config" ]
+  configs -= [ "//build/config/compiler:chromium_code" ]
+  configs += [ "//build/config/compiler:no_chromium_code" ]
+  if (!is_win) {
+    cflags = [ "-mavx2" ]

[ckocagil, 2015/01/22 18:25:13]

This should be:

  if (is_win) {
    cflags = [ "/arch:AVX" ]
  } else {
    cflags = [ "-mavx2" ]
  }

+  }
+  if (cpu_arch == "x86") {
+    sources = libvpx_srcs_x86_avx2
+  } else if (cpu_arch == "x64") {
+    sources = libvpx_srcs_x86_64_avx2
+  }
+}
+
 if (cpu_arch_full == "arm-neon-cpu-detect") {
   static_library("libvpx_intrinsics_neon") {
     configs -= [ "//build/config/compiler:compiler_arm_fpu" ]
@@ -220,6 +234,7 @@ static_library("libvpx") {
       ":libvpx_intrinsics_sse2",
       ":libvpx_intrinsics_ssse3",
       ":libvpx_intrinsics_sse4_1",
+      ":libvpx_intrinsics_avx2",
     ]
   }
   if (cpu_arch_full == "arm-neon-cpu-detect") {