Update FLAC to 1.3.1

flac.gyp

Index: flac.gyp
diff --git a/flac.gyp b/flac.gyp
index 95935cea8afd23278c02d326704617e81fc0a8db..cea6e98b42be4cc4d168786f4dee87c71ab6a90d 100644
--- a/flac.gyp
+++ b/flac.gyp
@@ -19,6 +19,9 @@
         'include/FLAC/stream_decoder.h',
         'include/FLAC/stream_encoder.h',
         'include/share/alloc.h',
+        'include/share/compat.h',
+        'include/share/endswap.h',
+        'include/share/private.h',
         'src/libFLAC/alloc.c',
         'src/libFLAC/bitmath.c',
         'src/libFLAC/bitreader.c',
@@ -45,9 +48,11 @@
         'src/libFLAC/include/private/float.h',
         'src/libFLAC/include/private/format.h',
         'src/libFLAC/include/private/lpc.h',
+        'src/libFLAC/include/private/macros.h',
         'src/libFLAC/include/private/md5.h',
         'src/libFLAC/include/private/memory.h',
         'src/libFLAC/include/private/metadata.h',
+        'src/libFLAC/include/private/stream_encoder.h',
         'src/libFLAC/include/private/stream_encoder_framing.h',
         'src/libFLAC/include/private/window.h',
         'src/libFLAC/include/protected/all.h',
@@ -57,7 +62,31 @@
       'defines': [
         'FLAC__NO_DLL',
         'FLAC__OVERFLOW_DETECT',
-        'VERSION="1.2.1"',
+        'VERSION="1.3.1"',
+        'HAVE_LROUND',
+      ],
+      'conditions': [
+        ['OS=="win"', {
+          'sources': [
+            'include/share/win_utf8_io.h',
+            'src/share/win_utf8_io/win_utf8_io.c',
+          ],
+          'defines!': [
+            'WIN32_LEAN_AND_MEAN',  # win_utf8_io.c defines this itself.
+          ],
+          'msvs_settings': {
+            'VCCLCompilerTool': {
+              'AdditionalOptions': [
+                '/wd4334',  # 32-bit shift converted to 64 bits.
+                '/wd4267',  # Converting from size_t to unsigned on 64-bit.
+              ],
+            },
+          },
+        }, {
+          'defines': [
+            'HAVE_INTTYPES_H',
+          ],
+        }],
       ],
       'include_dirs': [
         'include',