Pull buildtools to get GN r293190

TBR=jamesr

Review URL: https://codereview.chromium.org/535173003

Cr-Commit-Position: refs/heads/master@{#293269}

DEPS

@@ -58,7 +58,7 @@ vars = {
   # 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': '2328da46142d2abb4fbe08a6ac056f50e6df0e61',
+  'buildtools_revision': 'ea4dc0e322f4c4c3784ace03b47de99184c4cb55',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFIum
   # and whatever else without interference from each other.

build/config/BUILDCONFIG.gn

@@ -505,6 +505,11 @@ template("component") {
       configs = []  # Prevent list overwriting warning.
       configs = invoker.configs
 
+      # The sources assignment filter will have already been applied when the
+      # code was originally executed. We don't want to apply it again, since
+      # the original target may have override it for some assignments.
+      set_sources_assignment_filter([])
+
       if (defined(invoker.all_dependent_configs)) { all_dependent_configs = invoker.all_dependent_configs }
       if (defined(invoker.cflags)) { cflags = invoker.cflags }
       if (defined(invoker.cflags_c)) { cflags_c = invoker.cflags_c }
@@ -533,6 +538,9 @@ template("component") {
       configs = []  # Prevent list overwriting warning.
       configs = invoker.configs
 
+      # See above call.
+      set_sources_assignment_filter([])
+
       if (defined(invoker.all_dependent_configs)) { all_dependent_configs = invoker.all_dependent_configs }
       if (defined(invoker.cflags)) { cflags = invoker.cflags }
       if (defined(invoker.cflags_c)) { cflags_c = invoker.cflags_c }
@@ -572,6 +580,9 @@ template("test") {
     configs = []  # Prevent list overwriting warning.
     configs = invoker.configs
 
+    # See above call.
+    set_sources_assignment_filter([])
+
     if (defined(invoker.all_dependent_configs)) { all_dependent_configs = invoker.all_dependent_configs }
     if (defined(invoker.cflags)) { cflags = invoker.cflags }
     if (defined(invoker.cflags_c)) { cflags_c = invoker.cflags_c }