contrib: Add cmake for the Mac OS X framework at least.

extras/contrib/src/Distributions/darwin.mak

 # Darwin rules
-all: .autoconf .automake .libtool .intl .pkgcfg .freetype .fribidi \
+all: .autoconf .automake .libtool .cmake .intl .pkgcfg .freetype .fribidi \
     .a52 .mpeg2 .id3tag .mad .ogg .vorbis .vorbisenc .theora \
     .flac .speex .shout .faad .faac .lame .twolame .ebml .matroska .ffmpeg \
     .dvdcss .dvdnav .dvdread .dvbpsi .live .caca .mod \

extras/contrib/src/packages.mak

@@ -38,6 +38,8 @@ LIBAMR_WB=$(PENGUIN)/amrwb-$(LIBAMR_WB_VERSION).tar.bz2
 # we have to use a newer though, because bootstrap won't work otherwise
 AUTOCONF_VERSION=2.61
 AUTOCONF_URL=$(GNU)/autoconf/autoconf-$(AUTOCONF_VERSION).tar.bz2
+CMAKE_VERSION=2.4.8
+CMAKE_URL=http://www.cmake.org/files/v2.4/cmake-$(CMAKE_VERSION).tar.gz
 LIBTOOL_VERSION=1.5.24
 LIBTOOL_URL=$(GNU)/libtool/libtool-$(LIBTOOL_VERSION).tar.gz
 AUTOMAKE_VERSION=1.9.6