Revert "never wonder if sun is not sun"

This reverts commit 06a5b619, which broke
Solaris/Illumos builds for no good reason, cf. mail thread starting at
<http://lists.freedesktop.org/archives/libreoffice/2015-January/065844.html>
"4.4.0.1 build error on sal/types.h on solaris/illumos."

Conflicts:
	include/sal/config.h

Change-Id: I063453ee1115ae3f97e2835828800c74e3cb5e48

include/sal/config.h

@@ -86,6 +86,11 @@
 #define SAL_CONFIGFILE( name ) name "rc"
 #endif
 
+#ifdef sun
+#undef sun
+#define sun sun
+#endif
+
 #if defined __clang__
 #if __has_warning("-Wpotentially-evaluated-expression")
 #pragma GCC diagnostic ignored "-Wpotentially-evaluated-expression"