internal/traceparser: skip test on iOS
internal/traceparser: skip test on iOS

The iOS test harness only include files from the tested package or
below. Skip a test on iOS that required files outside the package.

Change-Id: Iaee7e488eb783b443f2b2b84d8be2de01227ab62
Reviewed-on: https://go-review.googlesource.com/c/144110
Run-TryBot: Elias Naur <993af7099cb24ce1a88d64108ae1e8b0385f2fc0@gmail.com>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Peter Weinberger <dd140fb9530d791057dd8833ea6768ff65fcde71@google.com>

akutz/go,CAFxX/go,golang/go,akutz/go,cloudflare/go,cloudflare/go,cloudflare/go,golang/go,josharian/go,josharian/go,golang/go,josharian/go,cloudflare/go,CAFxX/go,josharian/go,josharian/go,akutz/go,nawawi/go,golang/go,CAFxX/go,josharian/go,akutz/go,akutz/go,golang/go,akutz/go,CAFxX/go,CAFxX/go,nawawi/go,cloudflare/go,cloudflare/go,CAFxX/go,CAFxX/go,golang/go,golang/go,nawawi/go,josharian/go,nawawi/go,akutz/go,cloudflare/go,josharian/go,nawawi/go,golang/go,nawawi/go,nawawi/go,nawawi/go,akutz/go,cloudflare/go,CAFxX/go