BHI260 SDK compiler errors

[Vincent]

Thanks for the suggestion.  

I will give this fix suggestion to our engineer team and try to fix it in next release version. 

[NoahAndrews-REV]

This has not yet been fixed in BHI260AB SDK 1.1.6. Furthermore, the fix that Jellomoldbrain suggested is no longer quite sufficient. I had to add "-Wl,--start-group" to the following line as well, after "${CMAKE_C_LINK_EXECUTABLE}".