Update buildroot to 2021.02.4 (#1522)

Signed-off-by: Stefan Agner <stefan@agner.ch>

buildroot/package/python3/0023-Add-an-option-to-disable-IDLE.patch

@@ -19,7 +19,7 @@ diff --git a/Makefile.pre.in b/Makefile.pre.in
 index e678c8817e..1148bd8708 100644
 --- a/Makefile.pre.in
 +++ b/Makefile.pre.in
-@@ -1355,7 +1355,9 @@ bininstall: altbininstall
+@@ -1372,7 +1372,9 @@ bininstall: altbininstall
  	-rm -f $(DESTDIR)$(LIBPC)/python3-embed.pc
  	(cd $(DESTDIR)$(LIBPC); $(LN) -s python-$(VERSION)-embed.pc python3-embed.pc)
  	-rm -f $(DESTDIR)$(BINDIR)/idle3
@@ -29,7 +29,7 @@ index e678c8817e..1148bd8708 100644
  	-rm -f $(DESTDIR)$(BINDIR)/pydoc3
  ifeq (@PYDOC@,yes)
  	(cd $(DESTDIR)$(BINDIR); $(LN) -s pydoc$(VERSION) pydoc3)
-@@ -1398,7 +1400,6 @@ LIBSUBDIRS=	site-packages \
+@@ -1419,7 +1421,6 @@ LIBSUBDIRS=	site-packages \
  		html json http dbm xmlrpc \
  		logging csv wsgiref urllib \
  		ctypes ctypes/macholib \
@@ -37,7 +37,7 @@ index e678c8817e..1148bd8708 100644
  		distutils distutils/command \
  		importlib \
  		turtledemo \
-@@ -1492,6 +1493,10 @@ ifeq (@EXPAT@,yes)
+@@ -1514,6 +1515,10 @@ ifeq (@EXPAT@,yes)
  LIBSUBDIRS += $(XMLLIBSUBDIRS)
  endif
  
@@ -52,7 +52,7 @@ diff --git a/configure.ac b/configure.ac
 index 5844e3b73f..7bd4623ccd 100644
 --- a/configure.ac
 +++ b/configure.ac
-@@ -3400,6 +3400,12 @@ AC_ARG_ENABLE(lib2to3,
+@@ -3429,6 +3429,12 @@ AC_ARG_ENABLE(lib2to3,
  	AS_HELP_STRING([--disable-lib2to3], [disable lib2to3]),
  	[ LIB2TO3="${enableval}" ], [ LIB2TO3=yes ])
  
@@ -69,7 +69,7 @@ diff --git a/setup.py b/setup.py
 index 211a160f29..c4ee989ba3 100644
 --- a/setup.py
 +++ b/setup.py
-@@ -2587,11 +2587,13 @@ def main():
+@@ -2566,11 +2566,13 @@ def main():
      import warnings
      warnings.filterwarnings("ignore",category=DeprecationWarning)