Use version 3.8.1 for valgrind in third_party and do away with log files

Summary:
valgrind 3.7.0 used currently has a bug that needs LD_PRELOAD being set as a workaround. This caused problems when run on jenkins. 3.8.1 has fixed this issue and we should use it from third party
Also, have done away with log files. The whole output will be there on the terminal and the failed tests will be listed at the end. This is done because jenkins only lets us download the different files and not view them in the browser which is undesirable.

Test Plan: make valgrind_check

Reviewers: akushner, dhruba, vamsi, sheki, heyongqiang

Reviewed By: sheki

CC: leveldb

Differential Revision: https://reviews.facebook.net/D9171

Makefile

@@ -31,7 +31,8 @@ MEMENVOBJECTS = $(MEMENV_SOURCES:.cc=.o)
 TESTUTIL = ./util/testutil.o
 TESTHARNESS = ./util/testharness.o $(TESTUTIL)
 VALGRIND_ERROR = 2
-VALGRIND_DIR = "VALGRIND_LOGS"
+VALGRIND_DIR = VALGRIND_LOGS
+VALGRIND_VER = /mnt/gvfs/third-party/3748fabb2c5e033009597bae1f9ef8bf4b218581/gcc-4.7.1-glibc-2.14.1/valgrind/valgrind-3.8.1/91ddd43/bin/valgrind
 VALGRIND_OPTS = --error-exitcode=$(VALGRIND_ERROR) --leak-check=full
 
 TESTS = \
@@ -120,8 +121,7 @@ valgrind_check: all $(PROGRAMS) $(TESTS)
 	echo TIMES in seconds TAKEN BY TESTS ON VALGRIND > $(VALGRIND_DIR)/valgrind_tests_times; \
 	for t in $(filter-out skiplist_test,$(TESTS)); do \
 		stime=`date '+%s'`; \
-		valgrind $(VALGRIND_OPTS) \
-		--log-file=$(VALGRIND_DIR)/valgrind_log_$$t ./$$t; \
+		$(VALGRIND_VER) $(VALGRIND_OPTS) ./$$t; \
 		if [ $$? -eq $(VALGRIND_ERROR) ] ; then \
 			echo $$t >> $(VALGRIND_DIR)/valgrind_failed_tests; \
 		fi; \

VALGRIND_LOGS/README

@@ -1,4 +1,4 @@
-This directory stores the tests that failed valgrind and the logs associated
+This directory stores the tests that failed valgrind and the times associated
 with the failed runs.
 "make valgrind_check" can be invoked to call valgrind on the rocksdb tests and
 generate files in this directory