profile: Emit paths only in the callgrind output.

The callgrind information should contain a path to an ELF file,
not an identifier. We thus only add the identifer when we don't
have something that looks like a path (or is the commpage.)

This allows applications that analyze callgrind output to merge
images with the same ELF file.

src/bin/debug/profile/CallgrindProfileResult.cpp

@@ -302,9 +302,17 @@ CallgrindProfileResult::_PrintFunction(FILE* out,
 		// need to print the image name
 		int32 index = fNextImageOutputIndex++;
 		image->SetOutputIndex(index);
-		fprintf(out,
-			"%sob=(%" B_PRId32 ") %s:%" B_PRId32 "\n", called ? "c" : "",
-			index, image->GetImage()->Name(), image->ID());
+		const char* name = image->GetImage()->Name();
+		if (name[0] == '/' || strcmp(name, "commpage") == 0) {
+			fprintf(out,
+				"%sob=(%" B_PRId32 ") %s\n", called ? "c" : "",
+				index, name);
+		} else {
+			// add ID to image name
+			fprintf(out,
+				"%sob=(%" B_PRId32 ") %s:%" B_PRId32 "\n", called ? "c" : "",
+				index, name, image->ID());
+		}
 	} else {
 		// image is already known
 		// TODO: We may not need to print it at all!