Apply suggestions from grafikbot review, and revert run duration

fuzzing/Jamfile

@@ -32,20 +32,20 @@ rule make-corpus ( target : sources + : properties * )
 }
 actions make-corpus
 {
-    "$(PYTHON:E=python)" "$(RUNNER)" $(<) $(>)
+    "$(PYTHON:E=python)" "$(RUNNER)" "$(<)" "$(>)"
 }
 toolset.flags $(__name__).make-corpus PYTHON <python.interpreter> ;
 
 for local fuzzer in $(all_fuzzers)
 {
-    local fuzz_time = 60 ;
+    local fuzz_time = 30 ;
     local corpus = /tmp/corpus/$(fuzzer) ;
     local min_corpus = /tmp/mincorpus/$(fuzzer) ;
     local seed_corpus = $(HERE)/seedcorpus/$(fuzzer) ;
     local seed_files = [ glob "$(seed_corpus)/*" ] ;
 
     # Create the output corpus directories
-    make $(corpus) : $(seed_files) : make-corpus ;
+    make $(corpus) : $(seed_files) : make-corpus : <dependency> $(.make-corpus-script) ;
     make $(min_corpus) : : common.MkDir ;
 
     # Build the fuzzer