Initial revision of libutf library.

Libutf is a port of Plan 9's support library for UTF-8 and Unicode.
Downloaded from http://swtch.com/plan9port/unix/libutf.tgz. No
modifications required to compile.

Change-Id: I5646bc8709bafc14039d30e28a0c69a804e78548
diff --git a/Make.Darwin-386 b/Make.Darwin-386
new file mode 100644
index 0000000..21ede6f
--- /dev/null
+++ b/Make.Darwin-386
@@ -0,0 +1,7 @@
+CC=gcc
+CFLAGS+=-Wall -Wno-missing-braces -Wno-parentheses -Wno-switch -O2 -g -c -I. -I${PREFIX}/include
+O=o
+AR=ar
+ARFLAGS=rvc
+NAN=nan64.$O
+RANLIB=ranlib