README: Add OS X specific notes

Xcode 4.3 do not provide autotools anymore.
libusbx now provides a Xcode project to ease build Mac OS X.
diff --git a/README.git b/README.git
index 6d7db42..6f3cef1 100644
--- a/README.git
+++ b/README.git
@@ -11,6 +11,18 @@
 whereas the latter does not invoke configure at all. If using autogen.sh, note
 that you can also append options, that will be passed as is to configure.
 
+OS X-specific notes:
+-------------------
+
+Starting with Xcode 4.3, neither Xcode.app nor the Xcode 'command line tools'
+includes autotools and so running either autogen.sh or bootstrap.sh will result
+in the message:
+
+libtoolize or glibtoolize was not found! Please install libtool.
+
+To proceed, you must find and install it from somewhere.
+
+Alternatively, you can use the Xcode project at Xcode/libusbx.xcodeproj.
 
 Notes related to submitting new developments:
 --------------------------------------------
diff --git a/libusb/version_nano.h b/libusb/version_nano.h
index 8e5c2d3..81595be 100644
--- a/libusb/version_nano.h
+++ b/libusb/version_nano.h
@@ -1 +1 @@
-#define LIBUSB_NANO 10799
+#define LIBUSB_NANO 10801