Add a libffi update as disabled package

disabled-packages/libffi-updated/build.sh

@@ -0,0 +1,16 @@
+TERMUX_PKG_HOMEPAGE=https://sourceware.org/libffi/
+TERMUX_PKG_DESCRIPTION="Library providing a portable, high level programming interface to various calling conventions"
+_COMMIT=60e4250a77eb3fde500bfd68ec40519fe34b21bd
+_DATE=20160904
+TERMUX_PKG_VERSION=3.2.1.$_DATE
+TERMUX_PKG_SRCURL=https://github.com/libffi/libffi/archive/${_COMMIT}.zip
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS="--disable-multi-os-directory"
+TERMUX_PKG_EXTRA_CONFIGURE_ARGS+=" --enable-symvers=no"
+TERMUX_PKG_RM_AFTER_INSTALL="lib/libffi-${TERMUX_PKG_VERSION}/include"
+TERMUX_PKG_FOLDERNAME=libffi-$_COMMIT
+TERMUX_PKG_CLANG=yes
+
+termux_step_pre_configure () {
+	cd $TERMUX_PKG_SRCDIR
+	./autogen.sh
+}

disabled-packages/libffi-updated/configure.ac.patch

@@ -0,0 +1,14 @@
+See https://github.com/libffi/libffi/pull/265
+
+diff -u -r ../libffi-60e4250a77eb3fde500bfd68ec40519fe34b21bd/configure.ac ./configure.ac
+--- ../libffi-60e4250a77eb3fde500bfd68ec40519fe34b21bd/configure.ac	2016-09-04 09:34:18.000000000 -0400
++++ ./configure.ac	2016-09-14 06:43:08.916379800 -0400
+@@ -197,7 +197,7 @@
+                  [Cannot use PROT_EXEC on this target, so, we revert to
+                    alternative means])
+      ;;
+-     *-apple-darwin* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris*)
++     *-apple-darwin* | *-*-freebsd* | *-*-kfreebsd* | *-*-openbsd* | *-pc-solaris* | *-linux-android*)
+        AC_DEFINE(FFI_MMAP_EXEC_WRIT, 1,
+                  [Cannot use malloc on this target, so, we revert to
+                    alternative means])

disabled-packages/libffi-updated/include-Makefile.am.patch

@@ -0,0 +1,10 @@
+diff -u -r ../libffi-60e4250a77eb3fde500bfd68ec40519fe34b21bd/include/Makefile.am ./include/Makefile.am
+--- ../libffi-60e4250a77eb3fde500bfd68ec40519fe34b21bd/include/Makefile.am	2016-09-04 09:34:18.000000000 -0400
++++ ./include/Makefile.am	2016-09-13 10:44:07.832744478 -0400
+@@ -6,5 +6,5 @@
+ noinst_HEADERS=ffi_common.h ffi_cfi.h
+ EXTRA_DIST=ffi.h.in
+ 
+-includesdir = $(libdir)/@PACKAGE_NAME@-@PACKAGE_VERSION@/include
++includesdir = $(includedir)
+ nodist_includes_HEADERS = ffi.h ffitarget.h

disabled-packages/libffi-updated/libffi.pc.in.patch

@@ -0,0 +1,12 @@
+diff -u -r ../libffi-3.1/libffi.pc.in ./libffi.pc.in
+--- ../libffi-3.1/libffi.pc.in	2014-04-25 19:45:13.000000000 +0200
++++ ./libffi.pc.in	2014-07-13 22:37:09.818674529 +0200
+@@ -2,7 +2,7 @@
+ 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

disabled-packages/libffi-updated/src-closures.c.patch

@@ -0,0 +1,14 @@
+See https://github.com/libffi/libffi/pull/265
+
+diff -u -r ../libffi-60e4250a77eb3fde500bfd68ec40519fe34b21bd/src/closures.c ./src/closures.c
+--- ../libffi-60e4250a77eb3fde500bfd68ec40519fe34b21bd/src/closures.c	2016-09-04 09:34:18.000000000 -0400
++++ ./src/closures.c	2016-09-14 16:51:05.956548790 -0400
+@@ -55,7 +55,7 @@
+ #endif
+ 
+ #if FFI_MMAP_EXEC_WRIT && !defined FFI_MMAP_EXEC_SELINUX
+-# ifdef __linux__
++# if defined(__linux__) && !defined(__ANDROID__)
+ /* When defined to 1 check for SELinux and if SELinux is active,
+    don't attempt PROT_EXEC|PROT_WRITE mapping at all, as that
+    might cause audit messages.  */