cmd/go: skip flaky fuzz tests

(Temporarily, until they can be fixed.)

For #49046
For #49047

Change-Id: Ib580a5e45a0955aabdfc1899ed38a262a37f66ab
Reviewed-on: https://go-review.googlesource.com/c/go/+/356649
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
diff --git a/src/cmd/go/testdata/script/test_fuzz_fuzztime.txt b/src/cmd/go/testdata/script/test_fuzz_fuzztime.txt
index 9c9972f..6264aca 100644
--- a/src/cmd/go/testdata/script/test_fuzz_fuzztime.txt
+++ b/src/cmd/go/testdata/script/test_fuzz_fuzztime.txt
@@ -1,3 +1,5 @@
+skip  # Flaky: https://golang.org/issue/49046
+
 # TODO(jayconrod): support shared memory on more platforms.
 [!darwin] [!linux] [!windows] skip
 
diff --git a/src/cmd/go/testdata/script/test_fuzz_mutator_repeat.txt b/src/cmd/go/testdata/script/test_fuzz_mutator_repeat.txt
index 0924ed3..f2952c3 100644
--- a/src/cmd/go/testdata/script/test_fuzz_mutator_repeat.txt
+++ b/src/cmd/go/testdata/script/test_fuzz_mutator_repeat.txt
@@ -1,3 +1,5 @@
+skip  # Flaky: https://golang.org/issue/49047
+
 # TODO(jayconrod): support shared memory on more platforms.
 [!darwin] [!linux] [!windows] skip