Install pregcc in a separate directory when building glibc
Install pregcc in a separate directory when building glibc

Pregcc is needed for glibc development, as full gcc is unable to rebuild glibc due to different libgcc.
Without this change, pregcc was overwritten at full gcc installation, now it is not.

This fix is only for glibc and only for Linux build.
Probably this change makes sense for newlib builds as well, but this is for another CLs.


Review URL: http://codereview.chromium.org/3928003

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@3521 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client