cmd/go: skip tests on openbsd

Author: derekparker

src/cmd/go/testdata/script/issue_43830.txt

@@ -2,6 +2,7 @@
 
 [!cgo] skip 'skipping test without cgo'
 [!exec:gcc] skip 'skipping test without gcc present'
+[openbsd] skip 'skipping test on openbsd due to older gcc'
 
 env CGO_CFLAGS='-flto -ffat-lto-objects'
 env CC='gcc'

src/cmd/go/testdata/script/issue_43830_2.txt

@@ -2,6 +2,7 @@
 
 [!cgo] skip 'skipping test without cgo'
 [!exec:gcc] skip 'skipping test without gcc present'
+[openbsd] skip 'skipping test on openbsd due to older gcc'
 
 env CGO_CFLAGS='-flto -ffat-lto-objects'
 env CC='gcc'