main/Makefile: Fix build failure on SmartOS/Illumos/SunOS

This patch fixes two issues when building on SmartOS:

- channels/chan_oss.c: it makes sure soundcard.h is found
- main/Makefile: only use "-Wl,--version-script" when GNU LD is used as the Sun
  Linker doesn't support that. Similar checks are already used elswhere in the
  Makefile

Review: https://reviewboard.asterisk.org/r/3426

ASTERISK-23576 #close
Reported by: Sebastian Wiedenroth
patches:
  fix-sunos.diff uploaded by Sebastian Wiedenroth (License 6597)
........

Merged revisions 412468 from http://svn.asterisk.org/svn/asterisk/branches/11
........

Merged revisions 412483 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@412484 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_oss.c

@@ -53,7 +53,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 
 #ifdef __linux
 #include <linux/soundcard.h>
-#elif defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__GLIBC__)
+#elif defined(__FreeBSD__) || defined(__CYGWIN__) || defined(__GLIBC__) || defined(__sun)
 #include <sys/soundcard.h>
 #else
 #include <soundcard.h>

main/Makefile

@@ -209,7 +209,9 @@ ASTSSL_LIB:=libasteriskssl.so
 $(ASTSSL_LIB).$(ASTSSL_SO_VERSION): _ASTLDFLAGS+=-Wl,-soname=$(ASTSSL_LIB).$(ASTSSL_SO_VERSION)
 $(ASTSSL_LIB).$(ASTSSL_SO_VERSION): _ASTCFLAGS+=-fPIC -DAST_MODULE=\"asteriskssl\"
 $(ASTSSL_LIB).$(ASTSSL_SO_VERSION): LIBS+=$(ASTSSL_LIBS)
-$(ASTSSL_LIB).$(ASTSSL_SO_VERSION): SO_SUPPRESS_SYMBOLS=-Wl,--version-script,libasteriskssl.exports,--warn-common
+ifeq ($(GNU_LD),1)
+    $(ASTSSL_LIB).$(ASTSSL_SO_VERSION): SO_SUPPRESS_SYMBOLS=-Wl,--version-script,libasteriskssl.exports,--warn-common
+endif
 $(ASTSSL_LIB).$(ASTSSL_SO_VERSION): SOLINK=$(DYLINK)
 
 # These rules are duplicated from $(ASTTOPDIR)/Makefile.rules because the library name