Only build ecpg test code when the test is to be performed, in line with

other test code.

Author: petere

src/interfaces/ecpg/Makefile

@@ -8,7 +8,6 @@ all install installdirs uninstall dep depend distprep:
 	$(MAKE) -C ecpglib $@
 	$(MAKE) -C compatlib $@
 	$(MAKE) -C preproc $@
-	$(MAKE) -C test $@
 
 clean distclean maintainer-clean:
 	-$(MAKE) -C include $@