Add support out-of-tree builds.
This commit adds a support for out-of-tree builds, i.e, object files,
executables and so on are writen to `$(OUTDIR)` (which defaults to
`build/<BUILD_TARGET>` directory.
This allows building Smalltalk/X from single source tree for multiple
targets.
makefile
modulList.*
source
stx
stx_dynamic
changes
binary
bitmaps
include
examples
resources
lib
not_delivered
userPatches
systemPatches
packages
package-cache
.*.mem
so_locations
*.img
*.sav
*.chg
errorOutput
out
err
main.c
objbc
*.log
*.scores
*.history
ttt*.o
ttt*.st
stxtmp_*
modules
symbols.h
preview.ps
*.tiff
*.xpm
*.xbm
*.xwd
*.gif
settings.stx
*.so.*
*.st
*.so
*.exe
*.com
*.dll
*.tds
m_*.c
*Settings.xml
symbols.stc
modules.stx
*.$$$
*.ncb
*.vcproj*.user
*.suo
Debug
buildDate.h
MyWorkspace.wsp
*.res
*.STH
*.sc
*.c
objvc
objmingw
*.pkg
*_pkg
*.out