Use labels in load statements
Use labels in load statements

This will fix some issue with loading skylark rules from @bazel_tools.

Tested with ./compile.sh all and also a project that use pkg_tar from
@bazel_tools (which is broken at HEAD).

--
Change-Id: Iffbb7134ef5fee497890c4d01b85084973d45ad0
Reviewed-on: https://bazel-review.googlesource.com/2800
MOS_MIGRATED_REVID=113508661

smparkes/rules_scala,bazelbuild/rules_scala,ianoc/rules_scala,smparkes/rules_scala,bazelbuild/rules_scala,bazelbuild/rules_scala,sdtwigg/rules_scala,ianoc/rules_scala,ianoc/rules_scala,smparkes/rules_scala,sdtwigg/rules_scala,sdtwigg/rules_scala