Move IEEE754 support code to lib/

It's not strictly core code.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/Makefile b/Makefile
index 8b8898c..6a3f85b 100644
--- a/Makefile
+++ b/Makefile
@@ -12,9 +12,9 @@
 SOURCE = gettime.c fio.c ioengines.c init.c stat.c log.c time.c filesetup.c \
 		eta.c verify.c memory.c io_u.c parse.c mutex.c options.c \
 		rbtree.c smalloc.c filehash.c profile.c debug.c lib/rand.c \
-		lib/num2str.c $(wildcard crc/*.c) engines/cpu.c \
+		lib/num2str.c lib/ieee754.c $(wildcard crc/*.c) engines/cpu.c \
 		engines/mmap.c engines/sync.c engines/null.c engines/net.c \
-		memalign.c server.c client.c iolog.c ieee754.c
+		memalign.c server.c client.c iolog.c
 
 ifeq ($(UNAME), Linux)
   SOURCE += diskutil.c fifo.c blktrace.c helpers.c cgroup.c trim.c \