Fix turbojpeg tests compilation.

test/Makefile.am

@@ -7,9 +7,9 @@ tjunittest_SOURCES=tjunittest.c ../common/turbojpeg.c ../common/turbojpeg.h \
 
 tjbench_SOURCES=tjbench.c ../common/turbojpeg.c ../common/turbojpeg.h \
 	tjutil.c tjutil.h bmp.c bmp.h
+tjbench_LDADD=$(LDADD) -lm
 
-
-INCLUDES = -I$(top_srcdir)
+INCLUDES = -I$(top_srcdir) -I$(top_srcdir)/common
 LDADD = ../libvncserver/libvncserver.la ../libvncclient/libvncclient.la @WSOCKLIB@
 
 if HAVE_LIBPTHREAD