merge compile fixes from 44080:

- with AST_DEVMODE, building codecs/lpc10 fails because of lots
  of warnings, and the configure step in editline fails as well.
  Fix this by removing the -Werror in these steps.

- on FreeBSD (but probably on other platforms as well), the final   
  link of asterisk fails because AST_LIBS was not exported to the
  subdirs Makefiles. Add a proper fix in the top-level Makefile
  (a possible alternative way is to add "export AST_LIBS" near
  the beginning of the file).
  With this fix, i believe that some of the platform-specific
  conditionals in main/Makefile are redundant (because they should
  be already dealt with in the top level Makefile) but i don't
  have a platform to check.




git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@44081 65c4cc65-6c06-0410-ace0-fbb531ad65f3

Makefile

@@ -15,6 +15,7 @@
 #
 # ASTCFLAGS - compiler options
 # ASTLDFLAGS - linker flags (not libraries)
+# AST_LIBS - libraries to build binaries XXX
 # LIBS - additional libraries, at top-level for all links,
 #      on a single object just for that object
 # SOLINK - linker flags used only for creating shared objects (.so files),
@@ -302,7 +303,7 @@ $(SUBDIRS): depend makeopts.embed_rules
 main: $(filter-out main,$(MOD_SUBDIRS))
 
 $(MOD_SUBDIRS):
-	@ASTCFLAGS="$(MOD_SUBDIR_CFLAGS) $(ASTCFLAGS)" ASTLDFLAGS="$(ASTLDFLAGS)" $(MAKE) --no-print-directory -C $@ SUBDIR=$@ all
+	@ASTCFLAGS="$(MOD_SUBDIR_CFLAGS) $(ASTCFLAGS)" ASTLDFLAGS="$(ASTLDFLAGS)" AST_LIBS="$(AST_LIBS)" $(MAKE) --no-print-directory -C $@ SUBDIR=$@ all
 
 $(OTHER_SUBDIRS):
 	@ASTCFLAGS="$(OTHER_SUBDIR_CFLAGS) $(ASTCFLAGS)" ASTLDFLAGS="$(ASTLDFLAGS)" $(MAKE) --no-print-directory -C $@ SUBDIR=$@ all