windows,launcher: Rlocation function now handles absolute paths correctly
windows,launcher: Rlocation function now handles absolute paths correctly

Fix https://github.com/bazelbuild/bazel/issues/5516

RELNOTES: None
PiperOrigin-RevId: 203448188

ulfjack/bazel,dropbox/bazel,perezd/bazel,davidzchen/bazel,ulfjack/bazel,bazelbuild/bazel,katre/bazel,safarmer/bazel,twitter-forks/bazel,akira-baruah/bazel,safarmer/bazel,ulfjack/bazel,akira-baruah/bazel,dslomov/bazel,akira-baruah/bazel,dslomov/bazel-windows,dropbox/bazel,meteorcloudy/bazel,ButterflyNetwork/bazel,cushon/bazel,werkt/bazel,dropbox/bazel,perezd/bazel,meteorcloudy/bazel,dropbox/bazel,katre/bazel,bazelbuild/bazel,davidzchen/bazel,aehlig/bazel,perezd/bazel,cushon/bazel,twitter-forks/bazel,meteorcloudy/bazel,katre/bazel,dslomov/bazel,ulfjack/bazel,akira-baruah/bazel,davidzchen/bazel,ulfjack/bazel,dslomov/bazel,meteorcloudy/bazel,safarmer/bazel,davidzchen/bazel,aehlig/bazel,perezd/bazel,ButterflyNetwork/bazel,meteorcloudy/bazel,safarmer/bazel,safarmer/bazel,twitter-forks/bazel,werkt/bazel,dropbox/bazel,bazelbuild/bazel,werkt/bazel,aehlig/bazel,cushon/bazel,aehlig/bazel,cushon/bazel,werkt/bazel,dslomov/bazel,dslomov/bazel-windows,ButterflyNetwork/bazel,aehlig/bazel,bazelbuild/bazel,twitter-forks/bazel,cushon/bazel,dslomov/bazel,ulfjack/bazel,dslomov/bazel-windows,perezd/bazel,perezd/bazel,davidzchen/bazel,akira-baruah/bazel,twitter-forks/bazel,ButterflyNetwork/bazel,ulfjack/bazel,davidzchen/bazel,ButterflyNetwork/bazel,dslomov/bazel,safarmer/bazel,dslomov/bazel-windows,katre/bazel,dslomov/bazel-windows,katre/bazel,meteorcloudy/bazel,werkt/bazel,aehlig/bazel,dslomov/bazel-windows,werkt/bazel,katre/bazel,twitter-forks/bazel,meteorcloudy/bazel,cushon/bazel,dropbox/bazel,davidzchen/bazel,twitter-forks/bazel,bazelbuild/bazel,ButterflyNetwork/bazel,aehlig/bazel,perezd/bazel,bazelbuild/bazel,akira-baruah/bazel,dslomov/bazel