[compiler-rt] Fix xray compilation errors: errno and size_t

Include errno.h, and use size_t instead of std::size_t, since stddef.h
was included (and not cstddef).

llvm-svn: 293057

compiler-rt/lib/xray/xray_fdr_logging.h

@@ -83,7 +83,7 @@ struct FDRLoggingOptions {
 };
 
 // Flight Data Recorder mode implementation interfaces.
-XRayLogInitStatus FDRLogging_init(std::size_t BufferSize, std::size_t BufferMax,
+XRayLogInitStatus FDRLogging_init(size_t BufferSize, size_t BufferMax,
                                   void *Options, size_t OptionsSize);
 XRayLogInitStatus FDRLogging_finalize();
 void FDRLogging_handleArg0(int32_t FuncId, XRayEntryType Entry);

compiler-rt/lib/xray/xray_utils.cc

@@ -16,6 +16,7 @@
 #include "xray_defs.h"
 #include "xray_flags.h"
 #include <cstdio>
+#include <errno.h>
 #include <fcntl.h>
 #include <iterator>
 #include <sys/types.h>