disable stack trace unittests for uClibc builds

base/debug/stack_trace_unittest.cc

Index: base/debug/stack_trace_unittest.cc
diff --git a/base/debug/stack_trace_unittest.cc b/base/debug/stack_trace_unittest.cc
index e593864faf1a602410af71e03073a823a3dd613b..eb0bd9ad7f3c2055bff5f4db1930d399f7833eb5 100644
--- a/base/debug/stack_trace_unittest.cc
+++ b/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)