libgo: fix typo in mksysinfo.sh script
libgo: fix typo in mksysinfo.sh script

Fix a small typo in the mksysinfo.sh script (incorrect input
file for a grep command).

Change-Id: I43993e258058a867d5f8d96e43524ce6eccf9ef9
Reviewed-on: https://go-review.googlesource.com/98635
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

golang/gofrontend,golang/gofrontend,golang/gofrontend,golang/gofrontend