Modified gcc to use external fastjar if available.

base/gcc/gcc.conf

@@ -121,6 +121,9 @@ else
 	else
 		var_append confopt ' ' "--enable-libgcj"
 		var_append languages ',' 'java'
+		if pkginstalled fastjar; then
+			var_append confopt ' ' "--disable-fastjar"
+		fi
 	fi
 
 	if [ "$SDECFG_PKG_GCC_OBJC" != 0 ] ; then