Move include/fxcodec to fxcodec/include

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 8007012a48c4ba704383f9760df74f5f622427eb..a2be53705e5397ec42cb4a48d73072e045eab7a0 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -510,6 +510,9 @@ static_library("fxcodec") {
     "core/fxcodec/codec/fx_codec_jbig.cpp",
     "core/fxcodec/codec/fx_codec_jpeg.cpp",
     "core/fxcodec/codec/fx_codec_jpx_opj.cpp",
+    "core/fxcodec/include/fx_codec.h",
+    "core/fxcodec/include/fx_codec_def.h",
+    "core/fxcodec/include/fx_codec_flate.h",
     "core/fxcodec/jbig2/JBig2_ArithDecoder.cpp",
     "core/fxcodec/jbig2/JBig2_ArithDecoder.h",
     "core/fxcodec/jbig2/JBig2_ArithIntDecoder.cpp",
@@ -549,9 +552,6 @@ static_library("fxcodec") {
     "core/fxcodec/jbig2/JBig2_SymbolDict.h",
     "core/fxcodec/jbig2/JBig2_TrdProc.cpp",
     "core/fxcodec/jbig2/JBig2_TrdProc.h",
-    "core/include/fxcodec/fx_codec.h",
-    "core/include/fxcodec/fx_codec_def.h",
-    "core/include/fxcodec/fx_codec_flate.h",
   ]
   include_dirs = []
   if (pdf_enable_xfa) {