configure.in: Add warnflags for XL/C on AIX during configure to avoid [Bug #3971]. See [ruby-core:32859]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@32923 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merges r32333 from trunk into ruby_1_9_2.¶
configure.in: Add warnflags for XL/C on AIX during configure
to avoid [Bug #3971]. See [ruby-core:32859]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@32923 b2dd03c8-39d4-4d8f-98ff-823fe69b080e