python-cffi: bump to 2.1.1

Refresh sha256 from PyPI sdist. Drop the macOS cross-compile patch;
2.1.1 already carries the sysconfig.get_platform() fix upstream.

Add test-version.sh: 2.1.1 ships the cffi-gen-src console tool, a
subcommand CLI with no version flag, so the generic per-executable
version probe fails the package ("No executables in the package
provided version"). test-version.sh skips that probe, and test.sh now
asserts cffi.__version__ against the packaged version.

Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>

lang/python/python-cffi/Makefile

@@ -8,11 +8,11 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=python-cffi
-PKG_VERSION:=2.0.0
-PKG_RELEASE:=2
+PKG_VERSION:=2.1.1
+PKG_RELEASE:=1
 
 PYPI_NAME:=cffi
-PKG_HASH:=44d1b5909021139fe36001ae048dbdde8214afa20200eda0f64c068cac5d5529
+PKG_HASH:=dd31f52ea1086513bb9df30f8fcee9b8918323ae067a3d5b78bc826a000712be
 
 PKG_LICENSE:=MIT
 PKG_LICENSE_FILES:=LICENSE