[Freewx-maint] Bug#627728: strace on build (of app)

[Luke Kenneth Casson Leighton]

close(3)                                = 0
stat("/usr/include/wx-2.9/wx/wxPython/i_files", 0x7fffa3b505d0) = -1
ENOENT (No such file or directory)
stat("/usr/include/wx-2.8/wx/wxPython/i_files", 0x7fffa3b505d0) = -1
ENOENT (No such file or directory)
stat("/usr/include/wx/wxPython/i_files", 0x7fffa3b505d0) = -1 ENOENT
(No such file or directory)
stat("/usr/wxPython/src", 0x7fffa3b505d0) = -1 ENOENT (No such file or
directory)
stat("/usr/../wxPython/src", 0x7fffa3b505d0) = -1 ENOENT (No such file
or directory)

this shows the locations where these mysterious i_files need to go.
the wx2.8-headers package has /usr/include/wx-2.8/wx/wxPython but no
i_files subdirectory.