Roll DEPS for various tools.

build_revision: a634e44
buildtools_revision: e6b510a
clang_revision: c55112f

TBR=thakis@chromium.org

Change-Id: I0b69740c2c744a7b4e2c7c7963e4fbdaf2cc0a82
Reviewed-on: https://pdfium-review.googlesource.com/3332
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index 83917d3..5fc2804 100644
--- a/DEPS
+++ b/DEPS
@@ -5,10 +5,10 @@
   'pdfium_git': 'https://pdfium.googlesource.com',
 
   'android_ndk_revision': '26d93ec07f3ce2ec2cdfeae1b21ee6f12ff868d8',
-  'build_revision': 'cc228aba0c2511ca3558b1675ab588808738f00d',
-  'buildtools_revision': 'cf493f8b1ae59611b19b000d7af922559b6ae92a',
+  'build_revision': 'a634e44492100123636cd2e66cc3cadd828f7031',
+  'buildtools_revision': 'e6b510a9daf822bbe9f922c200c58150803d2fd8',
   'catapult_revision': '86352b966b0245d6883e5f7df27687856978b6d7',
-  'clang_revision': '49cece5b02431a848652c7f60dd7b06d94e8d625',
+  'clang_revision': 'c55112ff399f9ad6958b4bb58ca031b8ada63628',
   'cygwin_revision': 'c89e446b273697fadf3a10ff1007a97c0b7de6df',
   'gen_library_loader_revision': '916d4acd8b2cde67a390737dfba90b3c37de23a1',
   'gmock_revision': '29763965ab52f24565299976b936d1265cb6a271',