Disable LLVM_ENABLE_ASSERTION

LLVM_ENABLE_ASSERTION causes eprintf definition collision in Mac OSX.

Change-Id: I6c5ed29a5262fcf5e7a8ef1e2208b2471f459e09
diff --git a/Android.mk b/Android.mk
index 9bc3b09..0347138 100644
--- a/Android.mk
+++ b/Android.mk
@@ -4,6 +4,7 @@
 LLVM_ROOT_PATH := external/llvm
 
 USE_DISASSEMBLER := true
+LLVM_ENABLE_ASSERTION := false
 
 # Shared library for target
 # ========================================================