version up : libffi 3.1.

also fix includedir and Libs in libffi.pc.

component/libffi/buildout.cfg

@@ -4,10 +4,13 @@ parts =
 
 [libffi]
 recipe = slapos.recipe.cmmi
-version = 3.0.13
+version = 3.1
 url = ftp://sourceware.org/pub/libffi/libffi-${:version}.tar.gz
-md5sum = 45f3b6dbc9ee7c7dfbbbc5feba571529
+md5sum = f5898b29bbfd70502831a212d9249d10
 location = ${buildout:parts-directory}/${:_buildout_section_name_}
+patch-options = -p1
+patches =
+  ${:_profile_base_location_}/includedir.diff#e430307d16a0d215a24ec2acff23d184
 configure-options =
   --disable-static
 # on x86_64 OpenSuse, libraries are installed under parts/libffi/lib64.

component/libffi/includedir.diff

+Index: b/libffi.pc.in
+===================================================================
+--- a/libffi.pc.in
++++ b/libffi.pc.in
+@@ -2,10 +2,10 @@ prefix=@prefix@
+ exec_prefix=@exec_prefix@
+ libdir=@libdir@
+ toolexeclibdir=@toolexeclibdir@
+-includedir=${libdir}/@PACKAGE_NAME@-@PACKAGE_VERSION@/include
++includedir=@includedir@
+ 
+ Name: @PACKAGE_NAME@
+ Description: Library supporting Foreign Function Interfaces
+ Version: @PACKAGE_VERSION@
+-Libs: -L${toolexeclibdir} -lffi
++Libs: -L${libdir} -lffi
+ Cflags: -I${includedir}
+Index: b/include/Makefile.am
+===================================================================
+--- a/include/Makefile.am
++++ b/include/Makefile.am
+@@ -5,5 +5,5 @@ AUTOMAKE_OPTIONS=foreign
+ DISTCLEANFILES=ffitarget.h
+ EXTRA_DIST=ffi.h.in ffi_common.h
+ 
+-includesdir = $(libdir)/@PACKAGE_NAME@-@PACKAGE_VERSION@/include
++includesdir = $(includedir)
+ nodist_includes_HEADERS = ffi.h ffitarget.h
+Index: b/include/Makefile.in
+===================================================================
+--- a/include/Makefile.in
++++ b/include/Makefile.in
+@@ -314,7 +314,7 @@ top_srcdir = @top_srcdir@
+ AUTOMAKE_OPTIONS = foreign
+ DISTCLEANFILES = ffitarget.h
+ EXTRA_DIST = ffi.h.in ffi_common.h
+-includesdir = $(libdir)/@PACKAGE_NAME@-@PACKAGE_VERSION@/include
++includesdir = $(includedir)
+ nodist_includes_HEADERS = ffi.h ffitarget.h
+ all: all-am
+