v2012.12.2

Bernhard Walle (1):
      zlib: Add alternative download URL

Michael Olbrich (14):
      fixup_ptxconfigs.sh: switch to PTXdist 2012.12.1
      ptxconfigs: update for PTXdist 2012.12.1
      rules: define HOST_ENV_CC/HOST_ENV_CXX if undefined
      glibc-headers: define BUILD_CC
      kernel-headers: define BUILDCC
      rules: disable makeinfo
      kernel-headers: use environment
      glibc-2.16: add security fix for CVE-2015-7547
      glibc-2.16: add make 4.x build fix
      glibc-2.14.1: add security fix for CVE-2015-7547
      glibc-2.14.1: add make 4.x build fix
      gcc-4.6.2: add fix when building with newer host tools
      gcc-4.7.2: add fix when building with newer host tools
      release 2012.12.2
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