Autoformat *.BUILD files. (open-telemetry#69)

Author: g-easy

tools/format.sh

@@ -51,7 +51,7 @@ fi
 if which "$BUILDIFIER" >/dev/null; then
   echo "Running $BUILDIFIER"
   "$BUILDIFIER" $($FIND -name WORKSPACE -print -o -name BUILD -print -o \
-    -name '*.bzl' -print)
+    -name '*.BUILD' -o -name '*.bzl' -print)
 else
   echo "Can't find buildifier. It can be installed with:"
   echo "  go get github.com/bazelbuild/buildtools/buildifier"