added streaming fuzzer tests for MT API

Also : fixed corner case, where nb of jobs completed becomes > jobQueueSize
which is possible when many flushes are issued
while there is not enough dst buffer to flush completed ones.

tests/Makefile

@@ -18,17 +18,13 @@
 # zstreamtest32: Same as zstreamtest, but forced to compile in 32-bits mode
 # ##########################################################################
 
-DESTDIR?=
-PREFIX ?= /usr/local
-BINDIR  = $(PREFIX)/bin
-MANDIR  = $(PREFIX)/share/man/man1
 ZSTDDIR = ../lib
 PRGDIR  = ../programs
 PYTHON ?= python3
 TESTARTEFACT := versionsTest namespaceTest
 
 
-CPPFLAGS+= -I$(ZSTDDIR) -I$(ZSTDDIR)/common -I$(ZSTDDIR)/dictBuilder -I$(ZSTDDIR)/deprecated -I$(PRGDIR)
+CPPFLAGS+= -I$(ZSTDDIR) -I$(ZSTDDIR)/common -I$(ZSTDDIR)/compress -I$(ZSTDDIR)/dictBuilder -I$(ZSTDDIR)/deprecated -I$(PRGDIR)
 CFLAGS  ?= -O3
 CFLAGS  += -Wall -Wextra -Wcast-qual -Wcast-align -Wshadow -Wstrict-aliasing=1 \
           -Wswitch-enum -Wdeclaration-after-statement -Wstrict-prototypes -Wundef