v8 linux-tick-processor: look for dbg symbols in /usr/lib/debug

patsje.patch

diff --git a/deps/v8/tools/tickprocessor.js b/deps/v8/tools/tickprocessor.js
index 4c4886d..3c531f9 100644
--- a/deps/v8/tools/tickprocessor.js
+++ b/deps/v8/tools/tickprocessor.js
@@ -620,16 +620,33 @@ inherits(UnixCppEntriesProvider, CppEntriesProvider);
 
 UnixCppEntriesProvider.prototype.loadSymbols = function(libName) {
   this.parsePos = 0;
-  libName = this.targetRootFS + libName;
+
+  var lib = this.targetRootFS + libName;
   try {
     this.symbols = [
-      os.system(this.nmExec, ['-C', '-n', '-S', libName], -1, -1),
-      os.system(this.nmExec, ['-C', '-n', '-S', '-D', libName], -1, -1)
+      os.system(this.nmExec, ['-C', '-n', '-S', lib], -1, -1),
+      os.system(this.nmExec, ['-C', '-n', '-S', '-D', lib], -1, -1)
     ];
+    return;
   } catch (e) {
-    // If the library cannot be found on this system let's not panic.
-    this.symbols = ['', ''];
+    // Ignore.
+  }
+
+  // Look for the dbg version of the library.
+  lib = this.targetRootFS + '/usr/lib/debug/' + libName;
+  try {
+    this.symbols = [
+      os.system(this.nmExec, ['-C', '-n', '-S', lib], -1, -1),
+      os.system(this.nmExec, ['-C', '-n', '-S', '-D', lib], -1, -1)
+    ];
+    return;
+  }
+  catch (e) {
+    // Ignore.
   }
+
+  // If the library cannot be found on this system let's not panic.
+  this.symbols = ['', ''];
 };