downloads: upgrade pip and setuptools to latest versions

We want to stay current.

setuptools changed the location of some binary sniffing code. So we
update our patch accordingly.

Author: indygreg

cpython-unix/build-cpython.sh

@@ -158,11 +158,11 @@ make -j ${NUM_CPUS} install DESTDIR=${ROOT}/out/python
 # setuptools has the same bug! So we need to install a patched version.
 pushd ${ROOT}/setuptools-${SETUPTOOLS_VERSION}
 patch -p1 <<EOF
-diff --git a/setuptools/glibc.py b/setuptools/glibc.py
-index a134591c..c9c3f378 100644
---- a/setuptools/glibc.py
-+++ b/setuptools/glibc.py
-@@ -14,7 +14,10 @@ def glibc_version_string():
+diff --git a/setuptools/_vendor/packaging/tags.py b/setuptools/_vendor/packaging/tags.py
+index ec9942f0..1b306ca7 100644
+--- a/setuptools/_vendor/packaging/tags.py
++++ b/setuptools/_vendor/packaging/tags.py
+@@ -283,7 +283,10 @@ def _glibc_version_string():
      # manpage says, "If filename is NULL, then the returned handle is for the
      # main program". This way we can let the linker do the work to figure out
      # which libc our process is actually using.

pythonbuild/downloads.py

@@ -282,10 +282,10 @@
         "version": "2.11.06",
     },
     "pip": {
-        "url": "https://files.pythonhosted.org/packages/ce/ea/9b445176a65ae4ba22dce1d93e4b5fe182f953df71a145f557cffaffc1bf/pip-19.3.1.tar.gz",
-        "size": 1393609,
-        "sha256": "21207d76c1031e517668898a6b46a9fb1501c7a4710ef5dfd6a40ad9e6757ea7",
-        "version": "19.3.1",
+        "url": "https://files.pythonhosted.org/packages/8e/76/66066b7bc71817238924c7e4b448abdb17eb0c92d645769c223f9ace478f/pip-20.0.2.tar.gz",
+        "size": 1433827,
+        "sha256": "7db0c8ea4c7ea51c8049640e8e6e7fde949de672bfa4949920675563a5a6967f",
+        "version": "20.0.2",
     },
     "readline": {
         "url": "ftp://ftp.gnu.org/gnu/readline/readline-6.3.tar.gz",
@@ -303,10 +303,10 @@
         "version": "1.30.1",
     },
     "setuptools": {
-        "url": "https://files.pythonhosted.org/packages/f4/d5/a6c19dcbcbc267aca376558797f036d9bcdff344c9f785fe7d0fe9a5f2a7/setuptools-41.4.0.zip",
-        "size": 855608,
-        "sha256": "7eae782ccf36b790c21bde7d86a4f303a441cd77036b25c559a602cf5186ce4d",
-        "version": "41.4.0",
+        "url": "https://files.pythonhosted.org/packages/68/75/d1d7b7340b9eb6e0388bf95729e63c410b381eb71fe8875cdfd949d8f9ce/setuptools-45.2.0.zip",
+        "size": 859896,
+        "sha256": "89c6e6011ec2f6d57d43a3f9296c4ef022c2cbf49bab26b407fe67992ae3397f",
+        "version": "45.2.0",
     },
     "sqlite": {
         "url": "https://www.sqlite.org/2020/sqlite-autoconf-3310100.tar.gz",