fix aptiv for definitely the last time now

Author: woodfell

cc/toolchains/gcc_arm_gnu_8_3/config.bzl

@@ -106,6 +106,7 @@ def _impl(ctx):
                             flags = [
                                 "--sysroot={}".format(ctx.attr.sysroot),
                                 "-no-canonical-prefixes",
+                                "-fno-canonical-system-headers",
                                 # Reproducibility
                                 "-Wno-builtin-macro-redefined",
                                 "-D__DATE__=\"redacted\"",

cc/toolchains/gcc_arm_gnu_8_3/swift_custom_features.bzl

@@ -41,9 +41,12 @@ _invalid_flags = [
     "-Wunused-const-variable",
     "-Wconversion",
     "-Wsign-conversion",
+    "-Wfloat-conversion",
 ]
 
-_extra_flags = []
+_extra_flags = [
+  "-Wno-float-conversion",
+]
 
 
 _all_compile_actions = [