fix llvm-symbolizer path

Author: kevinAlbs

.evergreen/compile-unix.sh

@@ -132,7 +132,7 @@ fi
 export UBSAN_OPTIONS="print_stacktrace=1 abort_on_error=1"
 # AddressSanitizer configuration
 export ASAN_OPTIONS="detect_leaks=1 abort_on_error=1 symbolize=1"
-export ASAN_SYMBOLIZER_PATH="/usr/lib/llvm-3.4/bin/llvm-symbolizer"
+export ASAN_SYMBOLIZER_PATH="/opt/mongodbtoolchain/v3/bin/llvm-symbolizer"
 
 case "$MARCH" in
    i386)