Relax glibc dependency to 2.17 on M61

This CL is a merge of "Roll buildtools to d511e4" [1], and a selective
merge of "Relax glibc requirement to 2.17" [2] (only the
expected_deps* files).

[1] https://chromium.googlesource.com/chromium/src.git/+/d12900b02e627d4d6af55c93b731e8ac6d5ee906
[2] https://chromium.googlesource.com/chromium/src.git/+/c2e32f4639a6c56eef7fc4f65160ac2896eca0f1

BUG=749077
TBR=thestig@chromium.org
NOPRESUBMIT=true
NOTRY=true
NOTREECHECKS=true

Change-Id: I8d2aa785b1db4011815c91c5e7d34d9ea89157b9
Reviewed-on: https://chromium-review.googlesource.com/598631
Reviewed-by: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/branch-heads/3163@{#243}
Cr-Branched-From: ff259bab28b35d242e10186cd63af7ed404fae0d-refs/heads/master@{#488528}
diff --git a/DEPS b/DEPS
index 39f1f83..223075a 100644
--- a/DEPS
+++ b/DEPS
@@ -56,7 +56,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling build tools
   # and whatever else without interference from each other.
-  'buildtools_revision': '5ad14542a6a74dd914f067b948c5d3e8d170396b',
+  'buildtools_revision': 'd511e4d53d6fc8037badbdf4b225c137e94b52fb',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.
diff --git a/chrome/installer/linux/debian/expected_deps_x64_jessie b/chrome/installer/linux/debian/expected_deps_x64_jessie
index dcaaa2e..2315179a3 100644
--- a/chrome/installer/linux/debian/expected_deps_x64_jessie
+++ b/chrome/installer/linux/debian/expected_deps_x64_jessie
@@ -1,7 +1,7 @@
 gconf-service
 libasound2 (>= 1.0.16)
 libatk1.0-0 (>= 1.12.4)
-libc6 (>= 2.18)
+libc6 (>= 2.17)
 libcairo2 (>= 1.6.0)
 libcups2 (>= 1.4.0)
 libdbus-1-3 (>= 1.2.14)
diff --git a/chrome/installer/linux/rpm/expected_deps_x86_64 b/chrome/installer/linux/rpm/expected_deps_x86_64
index cdb4117..fe6ca3e 100644
--- a/chrome/installer/linux/rpm/expected_deps_x86_64
+++ b/chrome/installer/linux/rpm/expected_deps_x86_64
@@ -19,7 +19,6 @@
 libc.so.6(GLIBC_2.14)(64bit)
 libc.so.6(GLIBC_2.15)(64bit)
 libc.so.6(GLIBC_2.17)(64bit)
-libc.so.6(GLIBC_2.18)(64bit)
 libc.so.6(GLIBC_2.2.5)(64bit)
 libc.so.6(GLIBC_2.3)(64bit)
 libc.so.6(GLIBC_2.3.2)(64bit)