[perf-prof] Adjust source position addresses according to ELF header size

src/perf-jit.h

Index: src/perf-jit.h
diff --git a/src/perf-jit.h b/src/perf-jit.h
index 6efa4bbd6b65c3d559ceba6afdbf092c964bf99e..2b0b4831e0c43da81ee72fb982d3c8523b9ddf9e 100644
--- a/src/perf-jit.h
+++ b/src/perf-jit.h
@@ -91,6 +91,14 @@ class PerfJitLogger : public CodeEventLogger {
 #endif
   }
 
+#if V8_TARGET_ARCH_32_BIT
+  static const int kElfHeaderSize = 0x34;
+#elif V8_TARGET_ARCH_64_BIT
+  static const int kElfHeaderSize = 0x40;
+#else
+#error Unknown target architecture pointer size
+#endif
+
   // Per-process singleton file. We assume that there is one main isolate;
   // to determine when it goes away, we keep reference count.
   static base::LazyRecursiveMutex file_mutex_;