python3: bump to 3.7.0

Other changes include:

 - Refreshing all necessary patches for 3.7.0

 - Add a hash for the license file.

 - Python no longer has it's own internal libffi, as such, host-libffi
   is now required to build host-python3, and is added as a
   dependency.

 - Drop PYTHON3_LIBTOOL_PATCH = NO, since there is no longer any
   internal libffi copy that was causing the libtool patching process
   to fail.

 - A new core module "uuid" is now is added in the Config.in file, and
   relies on util-linux's uuid library.

 - Also, a new patch: 0030-Fix-cross-compiling-the-uuid-module.patch
   is required to fix compiling the uuid module, because the include
   directory search path for uuid.h is hardcoded to /usr/include/uuid,
   which causes an "unsafe for cross-compilation" error during
   compiling if the host pc has uuid headers installed.

 - 0031-Add-an-option-to-disable-uuid-module.patch is added to allow
   disabling the Python3 UUID module, so that when
   BR2_PACKAGE_PYTHON3_UUID is disabled by the UUID library is
   present, the uuid Python module is not built, as expected.

 - 0032-fix-building-on-older-distributions.patch is added to change
   os.replace by os.rename in the update_file.py script to fix
   building on older Linux distributions that have older versions of
   python that don't include os.replace.

   os.rename acts in the same way as os.replace, but is cross-platform
   compatible. Because Buildroot is guaranteed to be built in a POSIX
   environment, it is safe to change replace to rename.

Tested on CentOS6 and Fedora28, All test results passed:
             br-arm-full [1/6]: OK
  br-arm-cortex-a9-glibc [2/6]: OK
   br-arm-cortex-m4-full [3/6]: SKIPPED
          br-x86-64-musl [4/6]: OK
      br-arm-full-static [5/6]: SKIPPED
armv5-ctng-linux-gnueabi [6/6]: OK
6 builds, 2 skipped, 0 build failed, 0 legal-info failed

Signed-off-by: Adam Duskett <aduskett@gmail.com>
[Thomas:
 - remove PYTHON3_LIBTOOL_PATCH = NO
 - improve the solution in patch 0030-Fix-cross-compiling-the-uuid-module
 - add patch 0031-Add-an-option-to-disable-uuid-module]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/package/python3/0032-fix-building-on-older-distributions.patch b/package/python3/0032-fix-building-on-older-distributions.patch
new file mode 100644
index 0000000000..0f7ee2a25f
--- /dev/null
+++ b/package/python3/0032-fix-building-on-older-distributions.patch
@@ -0,0 +1,38 @@
+From ba10bac420398270a0b992e85d93383373d5fcac Mon Sep 17 00:00:00 2001
+From: Adam Duskett <aduskett@greenlots.com>
+Date: Thu, 16 Aug 2018 14:52:37 -0700
+Subject: [PATCH] fix building on older distributions
+
+Python > 3.6.3 calls os.replace in the update_file.py script, during the
+regen-importlib phase of the build process.
+
+According to Doc/whatsnew/3.3.rst line 1631, os.replace acts in the same
+way as os.rename, however, it is now cross-platform compatible for Windows.
+
+Because BuildRoot is guaranteed only to be built in  POSIX environment, it is
+safe to change os.replace back to os.rename.
+
+This change fixes building on older systems such as CentOS7, that only come
+with python 2.
+
+Signed-off-by: Adam Duskett <aduskett@greenlots.com>
+---
+ Tools/scripts/update_file.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Tools/scripts/update_file.py b/Tools/scripts/update_file.py
+index 224585c69b..ef458c0c63 100644
+--- a/Tools/scripts/update_file.py
++++ b/Tools/scripts/update_file.py
+@@ -16,7 +16,7 @@ def main(old_path, new_path):
+     with open(new_path, 'rb') as f:
+         new_contents = f.read()
+     if old_contents != new_contents:
+-        os.replace(new_path, old_path)
++        os.rename(new_path, old_path)
+     else:
+         os.unlink(new_path)
+ 
+-- 
+2.14.4
+