BUILD: Changed 51Degrees option to support V3.2

Added support for city hash method, turned off multi threading support
and included maths library. Removed reference to compression library
which was never needed.
diff --git a/Makefile b/Makefile
index 74a4272..a7da80b 100644
--- a/Makefile
+++ b/Makefile
@@ -625,11 +625,12 @@
 51DEGREES_SRC =
 51DEGREES_INC = $(51DEGREES_SRC)
 51DEGREES_LIB = $(51DEGREES_SRC)
+OPTIONS_OBJS    += $(51DEGREES_LIB)/../cityhash/city.o
 OPTIONS_OBJS    += $(51DEGREES_LIB)/51Degrees.o
 OPTIONS_OBJS    += src/51d.o
-OPTIONS_CFLAGS  += -DUSE_51DEGREES $(if $(51DEGREES_INC),-I$(51DEGREES_INC))
+OPTIONS_CFLAGS  += -DUSE_51DEGREES -DFIFTYONEDEGREES_NO_THREADING $(if $(51DEGREES_INC),-I$(51DEGREES_INC))
 BUILD_OPTIONS   += $(call ignore_implicit,USE_51DEGREES)
-OPTIONS_LDFLAGS += $(if $(51DEGREES_LIB),-L$(51DEGREES_LIB)) -lz
+OPTIONS_LDFLAGS += $(if $(51DEGREES_LIB),-L$(51DEGREES_LIB)) -lm
 endif
 
 ifneq ($(USE_PCRE)$(USE_STATIC_PCRE)$(USE_PCRE_JIT),)