Makefile: armv6l does not have builtin atomics, needs -latomic

Mad props for running bees on an architecture so ancient that it doesn't
even have floating point.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>

src/Makefile

@@ -5,7 +5,7 @@ all: $(BEES)
 include ../makeflags
 -include ../localconf
 
-LIBS = -lcrucible -lpthread
+LIBS = -lcrucible -lpthread -latomic
 BEES_LDFLAGS = -L../lib $(LDFLAGS)
 
 BEES_OBJS = \

test/Makefile

@@ -19,7 +19,7 @@ FORCE:
 include ../makeflags
 -include ../localconf
 
-LIBS = -lcrucible -lpthread
+LIBS = -lcrucible -lpthread -latomic
 BEES_LDFLAGS = -L../lib $(LDFLAGS)
 
 %.dep: %.cc tests.h Makefile