crash_reporter: build on non-Linux hosts

BUG=24073089

Change-Id: Ica4593074b8860e77e799e5d5347a21e49893919
diff --git a/crash_reporter/Android.mk b/crash_reporter/Android.mk
index d122972..e797022 100644
--- a/crash_reporter/Android.mk
+++ b/crash_reporter/Android.mk
@@ -14,8 +14,6 @@
 
 LOCAL_PATH := $(call my-dir)
 
-ifeq ($(HOST_OS),linux)
-
 crash_reporter_cpp_extension := .cc
 
 crash_reporter_src := crash_collector.cc \
@@ -124,5 +122,3 @@
 LOCAL_SRC_FILES := $(crash_reporter_test_src)
 LOCAL_STATIC_LIBRARIES := libcrash libgmock
 include $(BUILD_NATIVE_TEST)
-
-endif # HOST_OS == linux