Build libturbojpeg.so using mapfile on Solaris


git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@115 632fc199-4ca6-4c93-a231-07263d6284db
diff --git a/Makefile.am b/Makefile.am
index 2f5ef00..372ed11 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -21,7 +21,7 @@
 
 if VERSION_SCRIPT
 
-libturbojpeg_la_LDFLAGS += -Wl,--version-script,$(srcdir)/turbojpeg-mapfile
+libturbojpeg_la_LDFLAGS += $(VERSION_SCRIPT_FLAG)$(srcdir)/turbojpeg-mapfile
 
 endif