Reverting eba28948a5 which was only necessary when cross-compiling the plugins for Android 2.0.

With the coming monolithic build using Android.mk files this won't be
necessary anymore.

src/libstrongswan/plugins/curl/Makefile.am

@@ -5,14 +5,12 @@ AM_CFLAGS = -rdynamic
 
 if MONOLITHIC
 noinst_LTLIBRARIES = libstrongswan-curl.la
-libstrongswan_curl_la_LIBADD =
 else
 plugin_LTLIBRARIES = libstrongswan-curl.la
-libstrongswan_curl_la_LIBADD = $(top_builddir)/src/libstrongswan/libstrongswan.la
 endif
 
 libstrongswan_curl_la_SOURCES = \
 	curl_plugin.h curl_plugin.c curl_fetcher.c curl_fetcher.h
 
 libstrongswan_curl_la_LDFLAGS = -module -avoid-version
-libstrongswan_curl_la_LIBADD += -lcurl
+libstrongswan_curl_la_LIBADD  = -lcurl