perf: Work around aliasing violation

Change-Id: Ib43bed1760c6f4536f770b74f0b12a7772ead8bd
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
diff --git a/util/header.c b/util/header.c
index 2c2c501..6c51c21 100644
--- a/util/header.c
+++ b/util/header.c
@@ -78,7 +78,7 @@
 #endif
 /* ANDROID_CHANGE_END */
 
-#define PERF_MAGIC	(*(u64 *)__perf_magic)
+#define PERF_MAGIC 0x454c494646524550 /*(*(u64 *)__perf_magic)*/
 
 
 struct perf_file_attr {