Disable detection of bugs on global variables.

This is a temporary change pending code cleanup.

We are already disabling detection of ODR violations. As it turns out,
an ODR between an ASan-instrumented library and a non-instrumented library
may actually crash ASan, and there is no obvious way out, and one of those
prevents us from booting a SANITIZE_TARGET image right now.

Bug: 21951850
Change-Id: I49508242ec96089a3d4d8b7e45f36323d62f2be9

core/config_sanitizers.mk

@@ -85,6 +85,7 @@ ifneq ($(filter address,$(my_sanitize)),)
     my_ldlibs += -lm -lpthread
     my_ldflags += -Wl,--no-as-needed
   else
+    my_cflags += -mllvm -asan-globals=0
     # ASan runtime library must be the first in the link order.
     my_shared_libraries := $($(LOCAL_2ND_ARCH_VAR_PREFIX)ADDRESS_SANITIZER_RUNTIME_LIBRARY) \
                            $(my_shared_libraries) \