add some directories to the common makefile

js2/common.mk

@@ -1,3 +1,10 @@
+
+BOEHM_DIR = $(top_srcdir)/../gc/boehm/
+LIBBOEHM = $(BOEHM_DIR)/gc.a
+
+JS2_DIR = $(top_srcdir)/src/
+LIBJS2 = $(JS2_DIR)/libjs2.a
+
 WFLAGS = -Wmissing-prototypes -Wstrict-prototypes -Wunused \
          -Wswitch