gnucash master: Multiple changes pushed

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/43c81b6e (commit)
	 via  https://github.com/Gnucash/gnucash/commit/5b2439e7 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/e1ba2ed4 (commit)
	from  https://github.com/Gnucash/gnucash/commit/77d5d638 (commit)



commit 43c81b6ebbff15ddab3896b7cab5755aed437c37
Author: John Ralls <jralls at ceridwen.us>
Date:   Wed Sep 6 22:28:13 2017 -0700

    Add include of Foundation framework for NSString and NSBundle.

commit 5b2439e7c993dd65969275836074fd20faf1bd1e
Author: John Ralls <jralls at ceridwen.us>
Date:   Wed Sep 6 22:24:19 2017 -0700

    Set -xobjective-c or -xobjective-c++ for Mac code depending compiler.
    
    Also require at least Cmake-3.3 for Apple as that's the minimum that
    supports the COMPILE_LANGUAGE generator expression.

commit e1ba2ed4bd0b057cca0a04c431d5ff8157eb3e44
Author: John Ralls <jralls at ceridwen.us>
Date:   Wed Sep 6 14:51:26 2017 -0700

    Append to string the pre-cmake-3.4 way.



Summary of changes:
 CMakeLists.txt                               | 4 ++--
 libgnucash/core-utils/gnc-filepath-utils.cpp | 3 +++
 po/CMakeLists.txt                            | 2 +-
 3 files changed, 6 insertions(+), 3 deletions(-)