Configure: fixed clang detection on MINIX.

As per POSIX, basic regular expressions have no alternations, and the
interpretation of the "\|" construct is undefined.  At least on MINIX
and Solaris grep interprets "\|" as literal "|", and not as an alternation
as GNU grep does.  Removed such constructs introduced in f1daa0356a1d.
This fixes clang detection on MINIX.
2 files changed
tree: a3dfa242758d84c2dc4e9008e80ce93fbed84c27
  1. auto/
  2. conf/
  3. contrib/
  4. docs/
  5. misc/
  6. src/
  7. .hgtags