Split src/opts source lists out of opts.gyp.

This should make it easier to keep our opts.gyp in sync with Chrome's GYP and GN.

BUG=skia:

Landing this without review as a mega-tryjob.
TBR=reed@google.com

Committed: https://skia.googlesource.com/skia/+/c98fe3aa4f8c97c462c0eb6d9106fc37e48d7f82

Review URL: https://codereview.chromium.org/870353003
diff --git a/gyp/opts.gypi b/gyp/opts.gypi
new file mode 100644
index 0000000..f6257a9
--- /dev/null
+++ b/gyp/opts.gypi
@@ -0,0 +1,83 @@
+{
+        'none_sources': [
+            '<(skia_src_path)/opts/SkBitmapProcState_opts_none.cpp',
+            '<(skia_src_path)/opts/SkBlitMask_opts_none.cpp',
+            '<(skia_src_path)/opts/SkBlitRow_opts_none.cpp',
+            '<(skia_src_path)/opts/SkBlurImage_opts_none.cpp',
+            '<(skia_src_path)/opts/SkMorphology_opts_none.cpp',
+            '<(skia_src_path)/opts/SkTextureCompression_opts_none.cpp',
+            '<(skia_src_path)/opts/SkUtils_opts_none.cpp',
+            '<(skia_src_path)/opts/SkXfermode_opts_none.cpp',
+        ],
+
+        'armv7_sources': [
+            '<(skia_src_path)/opts/SkBitmapProcState_opts_arm.cpp',
+            '<(skia_src_path)/opts/SkBlitMask_opts_arm.cpp',
+            '<(skia_src_path)/opts/SkBlitRow_opts_arm.cpp',
+            '<(skia_src_path)/opts/SkBlurImage_opts_arm.cpp',
+            '<(skia_src_path)/opts/SkMorphology_opts_arm.cpp',
+            '<(skia_src_path)/opts/SkTextureCompression_opts_arm.cpp',
+            '<(skia_src_path)/opts/SkUtils_opts_arm.cpp',
+            '<(skia_src_path)/opts/SkXfermode_opts_arm.cpp',
+            '<(skia_src_path)/opts/memset.arm.S',
+        ],
+        'neon_sources': [
+            '<(skia_src_path)/opts/SkBitmapProcState_arm_neon.cpp',
+            '<(skia_src_path)/opts/SkBitmapProcState_matrixProcs_neon.cpp',
+            '<(skia_src_path)/opts/SkBlitMask_opts_arm_neon.cpp',
+            '<(skia_src_path)/opts/SkBlitRow_opts_arm_neon.cpp',
+            '<(skia_src_path)/opts/SkBlurImage_opts_neon.cpp',
+            '<(skia_src_path)/opts/SkMorphology_opts_neon.cpp',
+            '<(skia_src_path)/opts/SkTextureCompression_opts_neon.cpp',
+            '<(skia_src_path)/opts/SkXfermode_opts_arm_neon.cpp',
+            '<(skia_src_path)/opts/memset16_neon.S',
+            '<(skia_src_path)/opts/memset32_neon.S',
+        ],
+        'arm64_sources': [
+            '<(skia_src_path)/opts/SkBitmapProcState_arm_neon.cpp',
+            '<(skia_src_path)/opts/SkBitmapProcState_matrixProcs_neon.cpp',
+            '<(skia_src_path)/opts/SkBitmapProcState_opts_arm.cpp',
+            '<(skia_src_path)/opts/SkBlitMask_opts_arm.cpp',
+            '<(skia_src_path)/opts/SkBlitMask_opts_arm_neon.cpp',
+            '<(skia_src_path)/opts/SkBlitRow_opts_arm.cpp',
+            '<(skia_src_path)/opts/SkBlitRow_opts_arm_neon.cpp',
+            '<(skia_src_path)/opts/SkBlurImage_opts_arm.cpp',
+            '<(skia_src_path)/opts/SkBlurImage_opts_neon.cpp',
+            '<(skia_src_path)/opts/SkMorphology_opts_arm.cpp',
+            '<(skia_src_path)/opts/SkMorphology_opts_neon.cpp',
+            '<(skia_src_path)/opts/SkTextureCompression_opts_none.cpp',
+            '<(skia_src_path)/opts/SkUtils_opts_none.cpp',
+            '<(skia_src_path)/opts/SkXfermode_opts_arm.cpp',
+            '<(skia_src_path)/opts/SkXfermode_opts_arm_neon.cpp',
+        ],
+
+        'mips_dsp_sources': [
+            '<(skia_src_path)/opts/SkBitmapProcState_opts_mips_dsp.cpp',
+            '<(skia_src_path)/opts/SkBlitMask_opts_none.cpp',
+            '<(skia_src_path)/opts/SkBlitRow_opts_mips_dsp.cpp',
+            '<(skia_src_path)/opts/SkBlurImage_opts_none.cpp',
+            '<(skia_src_path)/opts/SkMorphology_opts_none.cpp',
+            '<(skia_src_path)/opts/SkTextureCompression_opts_none.cpp',
+            '<(skia_src_path)/opts/SkUtils_opts_none.cpp',
+            '<(skia_src_path)/opts/SkXfermode_opts_none.cpp',
+        ],
+
+        'sse2_sources': [
+            '<(skia_src_path)/opts/SkBitmapFilter_opts_SSE2.cpp',
+            '<(skia_src_path)/opts/SkBitmapProcState_opts_SSE2.cpp',
+            '<(skia_src_path)/opts/SkBlitRect_opts_SSE2.cpp',
+            '<(skia_src_path)/opts/SkBlitRow_opts_SSE2.cpp',
+            '<(skia_src_path)/opts/SkBlurImage_opts_SSE2.cpp',
+            '<(skia_src_path)/opts/SkMorphology_opts_SSE2.cpp',
+            '<(skia_src_path)/opts/SkTextureCompression_opts_none.cpp',
+            '<(skia_src_path)/opts/SkUtils_opts_SSE2.cpp',
+            '<(skia_src_path)/opts/SkXfermode_opts_SSE2.cpp',
+            '<(skia_src_path)/opts/opts_check_x86.cpp',
+        ],
+        'ssse3_sources': [
+            '<(skia_src_path)/opts/SkBitmapProcState_opts_SSSE3.cpp',
+        ],
+        'sse41_sources': [
+            '<(skia_src_path)/opts/SkBlurImage_opts_SSE4.cpp',
+        ],
+}