add SKIP_KNOWN_BUGS and SKIP_INTERNET_TESTS to testsuite

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/testsuite/wget/wget--O-overrides--P b/testsuite/wget/wget--O-overrides--P
index fdb5d47..40a3a96 100644
--- a/testsuite/wget/wget--O-overrides--P
+++ b/testsuite/wget/wget--O-overrides--P
@@ -1,3 +1,5 @@
+test x"$SKIP_INTERNET_TESTS" != x"" && exit
+
 mkdir foo
 busybox wget -q -O index.html -P foo http://www.google.com/
 test -s index.html
diff --git a/testsuite/wget/wget-handles-empty-path b/testsuite/wget/wget-handles-empty-path
index 5b59183..01d60bd 100644
--- a/testsuite/wget/wget-handles-empty-path
+++ b/testsuite/wget/wget-handles-empty-path
@@ -1 +1,3 @@
+test x"$SKIP_INTERNET_TESTS" != x"" && exit
+
 busybox wget http://www.google.com
diff --git a/testsuite/wget/wget-retrieves-google-index b/testsuite/wget/wget-retrieves-google-index
index 7be9a80..f9dbb8b 100644
--- a/testsuite/wget/wget-retrieves-google-index
+++ b/testsuite/wget/wget-retrieves-google-index
@@ -1,2 +1,4 @@
+test x"$SKIP_INTERNET_TESTS" != x"" && exit
+
 busybox wget -q -O foo http://www.google.com/
 test -s foo
diff --git a/testsuite/wget/wget-supports--P b/testsuite/wget/wget-supports--P
index 9b4d095..bfe4ac4 100644
--- a/testsuite/wget/wget-supports--P
+++ b/testsuite/wget/wget-supports--P
@@ -1,3 +1,5 @@
+test x"$SKIP_INTERNET_TESTS" != x"" && exit
+
 mkdir foo
 busybox wget -q -P foo http://www.google.com/
 test -s foo/index.html