Move libfuzzer sanitizer options to README

This is something you might want to change depending on the version to
use, there is no point in us fixing this to something.
Reviewed-by: NRich Salz <rsalz@openssl.org>
GH: #2023

Configure

@@ -1110,10 +1110,6 @@ if ($disabled{"dynamic-engine"}) {
         $config{dynamic_engines} = 1;
 }
 
-unless ($disabled{"fuzz-libfuzzer"}) {
-    $config{cflags} .= "-fsanitize-coverage=edge,indirect-calls,8bit-counters ";
-}
-
 unless ($disabled{asan}) {
     $config{cflags} .= "-fsanitize=address ";
 }

fuzz/README.md

@@ -39,7 +39,8 @@ Configure for fuzzing:
             --with-fuzzer-include=../../svn-work/Fuzzer \
             --with-fuzzer-lib=../../svn-work/Fuzzer/libFuzzer \
             -DPEDANTIC enable-asan enable-ubsan no-shared \
-            -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
+            -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION \
+	    -fsanitize-coverage=edge,indirect-calls,8bit-counters
     $ sudo apt-get install make
     $ LDCMD=clang++ make -j
     $ fuzz/helper.py $FUZZER