MT#55283 add -latomic

This is needed on armel due to

/usr/bin/ld: ./../lib/auxlib.h:513: undefined reference to `__atomic_compare_exchange_8'
/usr/bin/ld: ./../lib/auxlib.h:507: undefined reference to `__atomic_load_8'

etc

Change-Id: I37793cb4d166a9cd8004a7a6b45ce67cb98d3798
(cherry picked from commit 5406e4efd8)

lib/common.Makefile

@@ -2,6 +2,7 @@ include ../lib/lib.Makefile
 
 CFLAGS += -fPIE
 LDFLAGS += -pie
+LDLIBS += -latomic
 
 all:
 	$(MAKE) $(TARGET) $(MANS)