added --enable-cocoa in help (Pavel Janík)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1735 c046a42c-6fe2-441c-8c8c-71466251a162

configure

@@ -375,6 +375,7 @@ echo "  --cc=CC                  use C compiler CC [$cc]"
 echo "  --host-cc=CC             use C compiler CC [$host_cc] for dyngen etc."
 echo "  --make=MAKE              use specified make [$make]"
 echo "  --static                 enable static build [$static]"
+echo "  --enable-cocoa           enable COCOA (Mac OS X only)"
 echo "  --enable-mingw32         enable Win32 cross compilation with mingw32"
 echo "  --enable-adlib           enable Adlib emulation"
 echo "  --enable-coreaudio       enable Coreaudio audio driver"