update AM_CPPFLAGS

git-svn-id: svn://bind10.isc.org/svn/bind10/trunk@2520 e5f2f494-b856-4b98-b285-d166d9295462

src/lib/config/tests/Makefile.am

@@ -1,4 +1,4 @@
-AM_CPPFLAGS = -I$(top_srcdir)/src/lib -I$(top_builddir)/src/lib/cc
+AM_CPPFLAGS = -I$(top_builddir)/src/lib -I$(top_srcdir)/src/lib
 
 AM_CXXFLAGS = $(B10_CXXFLAGS)
 # see src/lib/cc/Makefile.am for -Wno-unused-parameter