Fix build for UCLIBC platforms

tests/VarAllocTest.cpp

Index: tests/VarAllocTest.cpp
diff --git a/tests/VarAllocTest.cpp b/tests/VarAllocTest.cpp
index 18e421480d299ddf8397cb6fc020a093d6aa259f..b1a0cb352f9385312033c9eb8bd220edaa699a60 100644
--- a/tests/VarAllocTest.cpp
+++ b/tests/VarAllocTest.cpp
@@ -6,8 +6,8 @@ DEF_TEST(VarAlloc, r) {
     char* p = va.alloc(128, SK_MALLOC_THROW);
     sk_bzero(p, 128);  // Just checking this is safe.
 
-#ifndef SK_BUILD_FOR_ANDROID
-    // This method will always return 0 on Android.
+#if !defined(SK_BUILD_FOR_ANDROID) && !defined(__UCLIBC__)
+    // This method will always return 0 on Android and UCLIBC platforms.
     REPORTER_ASSERT(r, va.approxBytesAllocated() >= 128);
 #endif
 }