Disable unsigned integer overflow sanitization until libc++ is fixed.

Bug: http://b/26781196
Bug: http://b/25884483
Bug: http://b/26432628

Although this issue was first only manifesting on Fugu, it now affects
N9 and N6p as well. This change disables unsigned overflow sanitization
on all platforms. The real fix for libc++ (r257368) can't be committed
until we have updated Clang at least one more time.

Change-Id: I71e9c50d25ae4566d4c06f348183c4b22a4bb60a

libs/minikin/Android.mk

@@ -53,9 +53,7 @@ LOCAL_SHARED_LIBRARIES := $(minikin_shared_libraries)
 LOCAL_CLANG := true
 LOCAL_SANITIZE := signed-integer-overflow
 # b/26432628.
-ifeq ($(filter x86%,$(TARGET_ARCH)),)
-  LOCAL_SANITIZE += unsigned-integer-overflow
-endif
+#LOCAL_SANITIZE += unsigned-integer-overflow
 
 include $(BUILD_SHARED_LIBRARY)
 
@@ -70,9 +68,7 @@ LOCAL_SHARED_LIBRARIES := $(minikin_shared_libraries)
 LOCAL_CLANG := true
 LOCAL_SANITIZE := signed-integer-overflow
 # b/26432628.
-ifeq ($(filter x86%,$(TARGET_ARCH)),)
-  LOCAL_SANITIZE += unsigned-integer-overflow
-endif
+#LOCAL_SANITIZE += unsigned-integer-overflow
 
 include $(BUILD_STATIC_LIBRARY)