Merge branch 'msys2-python'

In MSYS2, we have two Python interpreters at our disposal, so we can
include the Python stuff in the build.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

config.mak.uname

@@ -775,6 +775,7 @@ ifeq ($(uname_S),MINGW)
         ifneq (CLANGARM64,$(MSYSTEM))
 		USE_NED_ALLOCATOR = YesPlease
         endif
+	NO_PYTHON =
         ifeq (/mingw64,$(subst 32,64,$(subst clangarm,mingw,$(prefix))))
 		# Move system config into top-level /etc/
 		ETC_GITCONFIG = ../etc/gitconfig