python3: bump to version 3.8

This required a bit work to get working, compared to other versions. So,
some things have changed a bit more significantly.

Some highlights:
* there is no longer a pgen executable, seems this is now part of
  libpython; let's see what this means for us in the future
* blake2 hash (from OpenSSL) detection needs some fixing; will upstream
  added patch 002-fix-blake2-detection.patch
* removed all bpo patches; those should be fixed in upstream
* some needed to be manually re-applied as stuff changed:
  - 001-enable-zlib.patch  - file changed
  - 004-do-not-write-bytes-codes.patch  - file changed
  - 015-abort-on-failed-modules.patch - variable was renamed
    cross_compiling -> CROSS_COMPILING
* 017_lib2to3_fix_pyc_search.patch - the code changed, it does not seem to
     have the original problem with respect to file-extension, as there
     does not seem to be any special extension logic anymore there
* 006-remove-multi-arch-and-local-paths.patch - dropped patch; I can't
     remember the full-details of this issue; it was something with
     Debian/Ubuntu's multi-arch stuff; it was probably added maybe due to
     some overzealous (on my part) thingy caused by some weird reports,
     that I could never solve; let's have this patch dropped and see
* make package/python3/refresh to reduce fuzz for the rest

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

lang/python/python3/patches/016-adjust-config-paths.patch

@@ -1,6 +1,6 @@
 --- a/Lib/distutils/sysconfig.py
 +++ b/Lib/distutils/sysconfig.py
-@@ -446,6 +446,7 @@ def _init_posix():
+@@ -445,6 +445,7 @@ def _init_posix():
          platform=sys.platform,
          multiarch=getattr(sys.implementation, '_multiarch', ''),
      ))
@@ -20,7 +20,7 @@
          abi=sys.abiflags,
 --- a/Makefile.pre.in
 +++ b/Makefile.pre.in
-@@ -1400,7 +1400,7 @@ libinstall:	build_all $(srcdir)/Modules/
+@@ -1460,7 +1460,7 @@ libinstall:	build_all $(srcdir)/Modules/
  			esac; \
  		done; \
  	done
@@ -29,7 +29,7 @@
  		$(DESTDIR)$(LIBDEST); \
  	$(INSTALL_DATA) $(srcdir)/LICENSE $(DESTDIR)$(LIBDEST)/LICENSE.txt
  ifeq (@COMPILE_ALL_TESTS@,yes)
-@@ -1545,7 +1545,7 @@ sharedinstall: sharedmods
+@@ -1618,7 +1618,7 @@ sharedinstall: sharedmods
  		--install-scripts=$(BINDIR) \
  		--install-platlib=$(DESTSHARED) \
  		--root=$(DESTDIR)/
@@ -40,8 +40,8 @@
  # Here are a couple of targets for MacOSX again, to install a full
 --- a/configure
 +++ b/configure
-@@ -15292,7 +15292,7 @@ LDVERSION='$(VERSION)$(ABIFLAGS)'
- $as_echo "$LDVERSION" >&6; }
+@@ -15181,7 +15181,7 @@ else
+ fi
  
  
 -if test x$PLATFORM_TRIPLET = x; then
@@ -51,7 +51,7 @@
    LIBPL='$(prefix)'"/lib/python${VERSION}/config-${LDVERSION}-${PLATFORM_TRIPLET}"
 --- a/configure.ac
 +++ b/configure.ac
-@@ -4753,7 +4753,7 @@ AC_MSG_RESULT($LDVERSION)
+@@ -4667,7 +4667,7 @@ fi
  
  dnl define LIBPL after ABIFLAGS and LDVERSION is defined.
  AC_SUBST(PY_ENABLE_SHARED)