pw_env_setup: Roll cipd to 4511c670f

This will enable parallel downloads. See also http://crbug.com/1217435.

Change-Id: I4ed3a6352707d80b6b79b2aa4bc6cfe51a1fa879
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/51524
Pigweed-Auto-Submit: Rob Mohr <mohrr@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: Ewout van Bekkum <ewout@google.com>
diff --git a/pw_env_setup/py/pw_env_setup/cipd_setup/.cipd_version b/pw_env_setup/py/pw_env_setup/cipd_setup/.cipd_version
index d60179a..b79be6d 100644
--- a/pw_env_setup/py/pw_env_setup/cipd_setup/.cipd_version
+++ b/pw_env_setup/py/pw_env_setup/cipd_setup/.cipd_version
@@ -1 +1 @@
-git_revision:0595f95a2a689f4f93f1b363fddeeb5614cfd435
+git_revision:4511c670f851c56473a7370c10c199cdad4dfc3c
diff --git a/pw_env_setup/py/pw_env_setup/cipd_setup/.cipd_version.digests b/pw_env_setup/py/pw_env_setup/cipd_setup/.cipd_version.digests
index 831294e..82b2541 100644
--- a/pw_env_setup/py/pw_env_setup/cipd_setup/.cipd_version.digests
+++ b/pw_env_setup/py/pw_env_setup/cipd_setup/.cipd_version.digests
@@ -1,23 +1,23 @@
 # This file was generated by
 #
 #  cipd selfupdate-roll -version-file .cipd_version \
-#      -version git_revision:0595f95a2a689f4f93f1b363fddeeb5614cfd435
+#      -version git_revision:4511c670f851c56473a7370c10c199cdad4dfc3c
 #
 # Do not modify manually. All changes will be overwritten.
 # Use 'cipd selfupdate-roll ...' to modify.
 
-aix-ppc64       sha256  15696797ee66c845ce225916013a4636696bd41ed47a0ac535a9124d22c41022
-linux-386       sha256  5470be1985b0e81ec0d23dc00576152545733cde81fa473eb49c33bc4036599c
-linux-amd64     sha256  1acf447faa0b487871cabdd7f6fc6be81386f5984d265ce39f8566513e8cef7f
-linux-arm64     sha256  c84fe3197e270e8e47845714db8bba8ccef5bfa764c1f8d8e93c1998f3159fd3
-linux-armv6l    sha256  0563054c1634d216978d5c551cb1c219288d22e2db5719270e423d1fd65665c3
-linux-mips64    sha256  263de3e97efb3e0c7478e353c2f90212df8f190d03d448bafb47b52dca1abe5e
-linux-mips64le  sha256  49abd7f3d1f92327e689a8a81f4f3cda9c1fe178cab0d05b624befc30711c3ec
-linux-mipsle    sha256  f782241a056dca749731b2412ab04ce252d2d882abba148a46b2b6fd8639e602
-linux-ppc64     sha256  627fa35e35cd9d1192aa142a763225ab937dbafe9b7380b69acc2202b88682e2
-linux-ppc64le   sha256  0ab2152e60571655c65c89381ff151773e70c4418a3dbbc1823d44ff6493567f
-linux-s390x     sha256  e35193afdbc5b44e056acf95debc12c2efaf4714815173fae9254b6ca6bf768f
-mac-amd64       sha256  7d4dce3743c139f9343011ba151f11a702477c02e0add14844f45e6600e56310
-mac-arm64       sha256  6faad926d9bd27f60dd12f1b5fa8d4977360cd8120fbd12e43ce0e7dd2176ee2
-windows-386     sha256  eba4e0ba48d329cb87685b484582cc86780f88be41ccc276409e6e224e70642d
-windows-amd64   sha256  c78ca9c4180ca98a57a697c1cf2ac86ef9ea7df197a606bb8fa67f0702c21837
+aix-ppc64       sha256  0696f6979153a326f5269ac24cc03a834de8472fc35d467efe13618d30186332
+linux-386       sha256  0299c0a3b1a86bccfb1ef974b981827649a64c42406205126e789b7cba466839
+linux-amd64     sha256  d2ef210cdcc2df1f3d0c74c5918999088426490ed000f009ebd7fdaec1f77222
+linux-arm64     sha256  98ccdf942ecee4744aa6469e4093e025983d005f9a22e34c0d35d70accc77351
+linux-armv6l    sha256  b74057db288278ccaa67bb444b5e6e84dbef0912636ca06fadf10f3f98c04ebe
+linux-mips64    sha256  1850c72d660bf1096b827aad422927fedc2f61428ff89c7f50ff05340bc226e1
+linux-mips64le  sha256  ceb9571d9fbcdd70d3744e96f69c55c53b2feec60b6326d59141a2a308acc87c
+linux-mipsle    sha256  07d1ecba6e9b33fdf7b5c31e82768579ee8633caeb439a566e3d8bdda589b575
+linux-ppc64     sha256  cffb1bd349b6eb53389d3318b88c73cf73fd8b56897f53a0bad455fbeacf501b
+linux-ppc64le   sha256  e021b4f6442a2b88018f008c6969776b4cc2c592de9107c07a43f182ef51e169
+linux-s390x     sha256  e91fe9df5b17bbefbe098a661581e3c61b940f5ec0303320d929ab86a6c4645c
+mac-amd64       sha256  d4e065720036cd381810e8503fa4c6cc45d69c19179ab35ba4eb0969a8580341
+mac-arm64       sha256  e4f78c9d58ab982419abcb5153f69050eeab7d28cac55ce8e8a9e12f822c2055
+windows-386     sha256  b761be1d35aa0d3b63a1aeaaf9a4952447fa7ea681e84dce603980a176092f17
+windows-amd64   sha256  53baa50b2f7cdcaa0e15510a2fd0debc0297db7914d848e209779ae74aaa3931