Mostly useful for components that are built with cmake.

c++ already exists. cmake searches for c++ in the same folder as it found cc.

aspell-en-dictionary, groonga-normalizer-mysql, file-msooxml, apache-antiloris are not shareable, they write files in other parts.

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81712

As currently it fallbacks to system's gettext

The mpc and mpfr component already in the component/binutils.cfg. Remove the duplicate ones.

Update: the test passed. @rafael 

/reviewed-on !163

also drop non-existing '--with-nm' option.

drop gcc-multiarch.patch that is no longer needed.
add ppl-0.11-gcc-4.9.patch to compile with gcc-4.9.

zc.buildout >= 1.6.0-dev-SlapOS-013 automatically rebuilds parts whose referring parts are modified.

that is required to compile varnish VCL in runtime.

that is required to compile varnish VCL in runtime.