Revert "Move decompress symbols into zstd_internal.h, remove dependency"

This reverts commit a152b4c67a5266f611db4a2eac4a79003852a795.

lib/dictBuilder/zdict.c

@@ -48,6 +48,7 @@
 #  define ZDICT_STATIC_LINKING_ONLY
 #endif
 #include "zdict.h"
+#include "decompress/zstd_decompress_internal.h" /* ZSTD_entropyDTables_t */
 
 
 /*-*************************************
@@ -108,7 +109,6 @@ size_t ZDICT_getDictHeaderSize(const void* dictBuffer, size_t dictSize)
         if (!dummyEntropyTables) {
             return 0;
         }
-
         dummyEntropyTables->hufTable[0] = (HUF_DTable)((HufLog)*0x1000001);
         headerSize = ZSTD_loadDEntropy(dummyEntropyTables, dictBuffer, dictSize);
         free(dummyEntropyTables);