disable stack trace unittests for uClibc builds

Since we disabled StackTrace::OutputToStream and StackTrace::Print
for uClibc builds, we should disable the related unittests for uClibc
too.

BUG=361130

Review URL: https://codereview.chromium.org/227503009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@262984 0039d316-1c4b-4281-b951-d872f2087c98

base/debug/stack_trace_unittest.cc

@@ -35,6 +35,7 @@ typedef testing::Test StackTraceTest;
 #else
 #define MAYBE_OutputToStream OutputToStream
 #endif
+#if !defined(__UCLIBC__)
 TEST_F(StackTraceTest, MAYBE_OutputToStream) {
   StackTrace trace;
 
@@ -130,6 +131,7 @@ TEST_F(StackTraceTest, DebugOutputToStream) {
 TEST_F(StackTraceTest, DebugPrintBacktrace) {
   StackTrace().Print();
 }
+#endif  // !defined(__UCLIBC__)
 
 #if defined(OS_POSIX) && !defined(OS_ANDROID)
 #if !defined(OS_IOS)