package/mtd: add patch to fix host build error with gcc 5.1

host-mtd build fails with gcc 5.1:
  error: redefinition of ‘hashtable_iterator_key’
  error: redefinition of ‘hashtable_iterator_value’

Indeed, both functions are defined twice - once in the header and once in the
source file. This is permitted in C11 (and maybe in C99).

Add a patch sent to upstream:
https://patchwork.ozlabs.org/patch/467254/

Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
Tested-by: Doug Kehn <rdkehn@yahoo.com>
Tested-by: Romain Naour <romain.naour@openwide.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/mtd/0005-mkfs.ubifs-Fix-build-with-gcc-5.1.patch

@@ -0,0 +1,76 @@
+From patchwork Sat May  2 12:38:06 2015
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: mkfs.ubifs: Fix build with gcc 5.1
+From: Bernhard Walle <bernhard@bwalle.de>
+X-Patchwork-Id: 467254
+Message-Id: <1430570286-30434-1-git-send-email-bernhard@bwalle.de>
+To: linux-mtd@lists.infradead.org
+Cc: Bernhard Walle <bernhard@bwalle.de>
+Date: Sat,  2 May 2015 14:38:06 +0200
+
+In gcc 5.1, the default C standard which is used to compile a C file,
+has changed from gnu89 to gnu11. This changed the meaning of 'extern
+inline'. See https://gcc.gnu.org/gcc-5/porting_to.html.
+
+In mkfs.ubifs, this leads to multiple definitions of
+hashtable_iterator_key and -hashtable_iterator_value. I think the most
+pragmatic way to fix the issue is to replace 'extern inline' with
+'static inline' here.
+
+Fetch from:
+https://patchwork.ozlabs.org/patch/467254/
+
+Signed-off-by: Bernhard Walle <bernhard@bwalle.de>
+Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks>
+---
+ mkfs.ubifs/hashtable/hashtable_itr.c | 12 ------------
+ mkfs.ubifs/hashtable/hashtable_itr.h |  4 ++--
+ 2 files changed, 2 insertions(+), 14 deletions(-)
+
+diff --git a/mkfs.ubifs/hashtable/hashtable_itr.c b/mkfs.ubifs/hashtable/hashtable_itr.c
+index 24f4dde..d102453 100644
+--- a/mkfs.ubifs/hashtable/hashtable_itr.c
++++ b/mkfs.ubifs/hashtable/hashtable_itr.c
+@@ -35,18 +35,6 @@ hashtable_iterator(struct hashtable *h)
+ }
+ 
+ /*****************************************************************************/
+-/* key      - return the key of the (key,value) pair at the current position */
+-/* value    - return the value of the (key,value) pair at the current position */
+-
+-void *
+-hashtable_iterator_key(struct hashtable_itr *i)
+-{ return i->e->k; }
+-
+-void *
+-hashtable_iterator_value(struct hashtable_itr *i)
+-{ return i->e->v; }
+-
+-/*****************************************************************************/
+ /* advance - advance the iterator to the next element
+  *           returns zero if advanced to end of table */
+ 
+diff --git a/mkfs.ubifs/hashtable/hashtable_itr.h b/mkfs.ubifs/hashtable/hashtable_itr.h
+index 87a97eb..5c94a04 100644
+--- a/mkfs.ubifs/hashtable/hashtable_itr.h
++++ b/mkfs.ubifs/hashtable/hashtable_itr.h
+@@ -28,7 +28,7 @@ hashtable_iterator(struct hashtable *h);
+ /* hashtable_iterator_key
+  * - return the value of the (key,value) pair at the current position */
+ 
+-extern inline void *
++static inline void *
+ hashtable_iterator_key(struct hashtable_itr *i)
+ {
+     return i->e->k;
+@@ -37,7 +37,7 @@ hashtable_iterator_key(struct hashtable_itr *i)
+ /*****************************************************************************/
+ /* value - return the value of the (key,value) pair at the current position */
+ 
+-extern inline void *
++static inline void *
+ hashtable_iterator_value(struct hashtable_itr *i)
+ {
+     return i->e->v;