not part of default build

bug 111365, JS standalone doesn't build on solaris.
point AS to /usr/ccs/bin/as

js/src/config/SunOS5.6.mk

@@ -36,7 +36,7 @@
 # Config stuff for SunOS5.5
 #
 
-AS = as
+AS = /usr/ccs/bin/as
 ifndef NS_USE_NATIVE
   CC = gcc
   CCC = g++