Clang: the tip-of-tree version is now 7.0.0

It was bumped in LLVM r321712.

TBR=thakis,rnk

Bug: none
Change-Id: Ief1c0855a99be9d23330b91b8e804348a070822c
Reviewed-on: https://chromium-review.googlesource.com/848748Reviewed-by: Hans Wennborg <hans@chromium.org>
Commit-Queue: Hans Wennborg <hans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#526707}

build/toolchain/toolchain.gni

@@ -48,7 +48,12 @@ hermetic_xcode_path =
 declare_args() {
   if (is_clang) {
     # Clang compiler version. Clang files are placed at version-dependent paths.
-    clang_version = "6.0.0"
+    if (llvm_force_head_revision) {
+      clang_version = "7.0.0"
+    } else {
+      # TODO(hans): Trunk was updated; remove after the next roll.
+      clang_version = "6.0.0"
+    }
   }
 }
 

tools/clang/scripts/update.py

@@ -890,6 +890,11 @@ def main():
       args.force_local_build):
     AddSvnToPathOnWin()
 
+  if use_head_revision:
+    # TODO(hans): Trunk was updated; remove after the next roll.
+    global VERSION
+    VERSION = '7.0.0'
+
   global CLANG_REVISION, PACKAGE_VERSION
   if args.print_revision:
     if use_head_revision or args.llvm_force_head_revision: