Attempt to fix build bot failures.

- Added to CoreTests in BUILD.gn
- Hiding DataAggregator std out/err outputs

Author: paschalis-mpeis

bolt/unittests/Core/MemoryMaps.cpp

@@ -98,6 +98,10 @@ TEST_P(MemoryMapsTester, ParseMultipleSegments) {
   BC->SegmentMapInfo[0x31d0000] =
       SegmentInfo{0x31d0000, 0x51ac82c, 0x31d0000, 0x3000000, 0x200000};
 
+  // Dont show DataAggregators out/err output.
+  testing::internal::CaptureStdout();
+  testing::internal::CaptureStderr();
+
   DataAggregator DA("");
   BC->setFilename(Filename);
   Error Err = DA.preprocessProfile(*BC);

llvm/utils/gn/secondary/bolt/unittests/Core/BUILD.gn

@@ -15,6 +15,7 @@ unittest("CoreTests") {
     "BinaryContext.cpp",
     "DynoStats.cpp",
     "MCPlusBuilder.cpp",
+    "MemoryMaps.cpp",
   ]
 
   defines = []