some workarounds for newer automake


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@70 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/Makefile.am b/Makefile.am
index c31f9dc..89aeffd 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -81,14 +81,14 @@
 vg_clientmalloc.o: vg_clientmalloc.c $(MANUAL_DEPS)
 	$(COMPILE) -fno-omit-frame-pointer -c $<
 
-valgrind.so: $(valgrind_so_OBJECTS)
+valgrind.so$(EXEEXT): $(valgrind_so_OBJECTS)
 	$(CC) $(CFLAGS) $(LDFLAGS) -shared -o valgrind.so \
 	$(valgrind_so_OBJECTS) $(valgrind_so_LDADD)
 
-valgrinq.so: $(valgrinq_so_OBJECTS)
+valgrinq.so$(EXEEXT): $(valgrinq_so_OBJECTS)
 	$(CC) $(CFLAGS) -shared -o valgrinq.so $(valgrinq_so_OBJECTS)
 
-libpthread.so: $(libpthread_so_OBJECTS)
+libpthread.so$(EXEEXT): $(libpthread_so_OBJECTS)
 	$(CC) -Wall -g -O -shared -fpic -o libpthread.so $(libpthread_so_OBJECTS)
 
 install-exec-hook: