Pass $(MATH_LIBS) $(NET_LIBS) when linking tests.

From-SVN: r179219

libgo/Makefile.am

@@ -1761,6 +1761,8 @@ GOTESTFLAGS =
 CHECK = \
 	GC="$(GOC) $(GOCFLAGS) -L `${PWD_COMMAND}` -L `${PWD_COMMAND}`/.libs"; \
 	export GC; \
+	GOLIBS="$(MATH_LIBS) $(NET_LIBS)"; \
+	export GOLIBS; \
 	RUNTESTFLAGS="$(RUNTESTFLAGS)"; \
 	export RUNTESTFLAGS; \
 	MAKE="$(MAKE)"; \

libgo/Makefile.in

@@ -2077,6 +2077,8 @@ GOTESTFLAGS =
 CHECK = \
 	GC="$(GOC) $(GOCFLAGS) -L `${PWD_COMMAND}` -L `${PWD_COMMAND}`/.libs"; \
 	export GC; \
+	GOLIBS="$(MATH_LIBS) $(NET_LIBS)"; \
+	export GOLIBS; \
 	RUNTESTFLAGS="$(RUNTESTFLAGS)"; \
 	export RUNTESTFLAGS; \
 	MAKE="$(MAKE)"; \

libgo/testsuite/gotest

@@ -16,7 +16,7 @@ export LC_CTYPE=C
 
 GC=${GC:-gccgo}
 GL=${GL:-${GC-gccgo}}
-GOLIBS=
+GOLIBS=${GOLIBS:-}
 export GC GL GOLIBS
 
 NM=${NM:-nm}