liblog: add logprint to host build

- cleanup of some style issues
- resolve a few minor bugs
- add -lrt for host so that clock_gettime can be issued
- enable write-only logging, logprint and event list
  handling tests for host consumption.

NB: CtsLiblogTestCases_list is only outlet for host testing of
    the interfaces, but it is not part of any automated testing

Test: gTest liblog-unit-tests, liblog-benchmarks and
      CtsLiblogTestCases_list && build mmma system/core/liblog
Bug: 27405083
Change-Id: I13db1f45f67569407587a5a909248de33809b8cf
diff --git a/liblog/tests/Android.mk b/liblog/tests/Android.mk
index 097befc..7343412 100644
--- a/liblog/tests/Android.mk
+++ b/liblog/tests/Android.mk
@@ -111,6 +111,7 @@
 LOCAL_CXX_STL := libc++
 LOCAL_SHARED_LIBRARIES := liblog libcutils libbase
 LOCAL_ADDITIONAL_DEPENDENCIES := $(LOCAL_PATH)/Android.mk
+LOCAL_LDLIBS_linux := -lrt
 include $(BUILD_HOST_NATIVE_TEST)
 
 endif  # ifeq ($(HOST_OS)-$(HOST_ARCH),$(filter $(HOST_OS)-$(HOST_ARCH),linux-x86 linux-x86_64))