Merge pull request #13 from bruvzg/astc_dedup

Remove duplicate ASTC encoder code.

SConstruct

@@ -489,29 +489,6 @@ angle_sources = [
     "third_party/zlib/trees.c",
     "third_party/zlib/uncompr.c",
     "third_party/zlib/zutil.c",
-    "third_party/astc-encoder/src/Source/astcenc_averages_and_directions.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_block_sizes.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_color_quantize.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_color_unquantize.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_compress_symbolic.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_compute_variance.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_decompress_symbolic.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_diagnostic_trace.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_entry.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_find_best_partitioning.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_ideal_endpoints_and_weights.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_image.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_integer_sequence.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_mathlib_softfloat.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_mathlib.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_partition_tables.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_percentile_tables.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_pick_best_endpoint_format.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_platform_isa_detection.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_quantization.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_symbolic_physical.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_weight_align.cpp",
-    "third_party/astc-encoder/src/Source/astcenc_weight_quant_xfer_tables.cpp",
 ]
 if env["platform"] == "macos":
     angle_sources += [