configure: Do not add omit-frame-pointer for ossfuzz

ossfuzz works better without it
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

configure

@@ -5175,7 +5175,7 @@ EOF
     exit 1
 fi
 
-disabled optimizations || check_cflags -fomit-frame-pointer
+disabled optimizations || enabled ossfuzz || check_cflags -fomit-frame-pointer
 
 enable_weak_pic() {
     disabled pic && return