Remove unnecessary include search path

httperf/src/lib/Makefile.am

@@ -1,5 +1,6 @@
 # what flags you want to pass to the C compiler & linker
-AM_CFLAGS = -I$(srcdir)/..
+# AM_CFLAGS = -I$(srcdir)/..
+AM_CFLAGS = 
 AM_LDFLAGS =
 
 noinst_LIBRARIES = libutil.a