[Ohrrpgce] SVN: teeemcee/8848 Fix check for has_overflow_builtins again: should check for gcc 5.0+ not

[subversion at HamsterRepublic.com]

teeemcee
2017-06-09 10:30:31 -0700 (Fri, 09 Jun 2017)
77
Fix check for has_overflow_builtins again: should check for gcc 5.0+ not 4.8+
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U   wip/common.h