Fix MinGW build

jinclude.h can't be safely included multiple times, so instead of
including it in the shared (broken-out) headers, it should instead be
included by the source files that include one or more of those headers.

jdapistd.c

@@ -4,7 +4,7 @@
  * This file was part of the Independent JPEG Group's software:
  * Copyright (C) 1994-1996, Thomas G. Lane.
  * libjpeg-turbo Modifications:
- * Copyright (C) 2010, 2015, D. R. Commander.
+ * Copyright (C) 2010, 2015-2016, D. R. Commander.
  * Copyright (C) 2015, Google, Inc.
  * For conditions of distribution and use, see the accompanying README.ijg
  * file.
@@ -18,6 +18,7 @@
  * whole decompression library into a transcoder.
  */
 
+#include "jinclude.h"
 #include "jdmainct.h"
 #include "jdcoefct.h"
 #include "jdsample.h"

jdcoefct.c

@@ -5,7 +5,7 @@
  * Copyright (C) 1994-1997, Thomas G. Lane.
  * libjpeg-turbo Modifications:
  * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
- * Copyright (C) 2010, 2015, D. R. Commander.
+ * Copyright (C) 2010, 2015-2016, D. R. Commander.
  * For conditions of distribution and use, see the accompanying README.ijg
  * file.
  *
@@ -18,6 +18,7 @@
  * Also, the input side (only) is used when reading a file for transcoding.
  */
 
+#include "jinclude.h"
 #include "jdcoefct.h"
 #include "jpegcomp.h"
 

jdcoefct.h

@@ -10,7 +10,6 @@
  */
 
 #define JPEG_INTERNALS
-#include "jinclude.h"
 #include "jpeglib.h"
 
 

jdmainct.c

@@ -4,7 +4,7 @@
  * This file was part of the Independent JPEG Group's software:
  * Copyright (C) 1994-1996, Thomas G. Lane.
  * libjpeg-turbo Modifications:
- * Copyright (C) 2010, D. R. Commander.
+ * Copyright (C) 2010, 2016, D. R. Commander.
  * For conditions of distribution and use, see the accompanying README.ijg
  * file.
  *
@@ -16,6 +16,7 @@
  * supplies the equivalent of the main buffer in that case.
  */
 
+#include "jinclude.h"
 #include "jdmainct.h"
 
 

jdmainct.h

@@ -8,7 +8,6 @@
  */
 
 #define JPEG_INTERNALS
-#include "jinclude.h"
 #include "jpeglib.h"
 #include "jpegcomp.h"
 

jdsample.c

@@ -5,7 +5,7 @@
  * Copyright (C) 1991-1996, Thomas G. Lane.
  * libjpeg-turbo Modifications:
  * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
- * Copyright (C) 2010, 2015, D. R. Commander.
+ * Copyright (C) 2010, 2015-2016, D. R. Commander.
  * Copyright (C) 2014, MIPS Technologies, Inc., California
  * For conditions of distribution and use, see the accompanying README.ijg
  * file.
@@ -23,6 +23,7 @@
  *   Pub. by IEEE Computer Society Press, Los Alamitos, CA. ISBN 0-8186-8944-7.
  */
 
+#include "jinclude.h"
 #include "jdsample.h"
 #include "jsimd.h"
 #include "jpegcomp.h"

jdsample.h

@@ -8,7 +8,6 @@
  */
 
 #define JPEG_INTERNALS
-#include "jinclude.h"
 #include "jpeglib.h"