gnucash master: Change minimum boost version to 1.55

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/d0fc57a5 (commit)
	from  https://github.com/Gnucash/gnucash/commit/e68c7eb9 (commit)



commit d0fc57a5a7590ef5bbee0e45045a5323713b2c17
Author: John Ralls <jralls at ceridwen.us>
Date:   Mon May 11 12:32:24 2015 -0700

    Change minimum boost version to 1.55
    
    There was a C++11 compilation bust in
    date_time/local_time/custom_time_zone.hpp, which was fixed in that
    version. Since we also require C++11, that makes it the minimum
    necessary.



Summary of changes:
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)