llc/test: Explicitly enable extended initialiser lists

To support extended initialiser lists some platforms (at least debian
squeeze) require to add -std=c++0x or -std=gnu++0x to CXXFLAGS. While
that option is deprecated on newer platforms (at least gcc 4.8) this
options is still supported on every platform currently in use.

This commit adds -std=gnu++0x to the CXXFLAGS used to compile
LlcTest.cpp.

Sponsored-by: On-Waves ehf
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 5d7aab0..861552f 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -66,6 +66,10 @@
 llc_LlcTest_LDFLAGS = \
 	-Wl,-u,bssgp_prim_cb
 
+# Compatibility with Debian Squeeze
+llc_LlcTest_CXXFLAGS = \
+	-std=gnu++0x
+
 llist_LListTest_SOURCES = llist/LListTest.cpp
 llist_LListTest_LDADD = \
 	$(LIBOSMOCORE_LIBS) \