Boost: added patch for TIME_UTC

Gives troubles if glibc version is too new and Boost version is too old.
Boost: fix find glibc version
Boost: reworked patching TIME_UTC
cleanup patching out TIME_UTC, patch in patch step (not configure)
Merge pull request #8 from boegel/boost

cleanup runtime patching in Boost easyblock
Merge pull request #412 from wpoely86/boost

Boost