macosx build issue

[Benjamin Reed]

for some reason, cmake 2.4.2 doesn't seem to be creating the
app-bundle directories before trying to link binaries:

---(snip!)---
Building CXX object
kdecore/kconfig_compiler/CMakeFiles/kconfig_compiler.dir/kconfig_compiler.o
Linking CXX executable
../../bin/kconfig_compiler.app/Contents/MacOS/kconfig_compiler
lipo: can't create output file:
../../bin/kconfig_compiler.app/Contents/MacOS/kconfig_compiler (No
such file or directory)
make[2]: *** [bin/kconfig_compiler.app/Contents/MacOS/kconfig_compiler] Error 1
---(snip!)---

if I mkdir the bin/.../MacOS directory, it works...