Don't bother setting LC_ALL, LC_CTYPE, and LANG on iOS

An iOS app might itself, for testing and debugging purposes, look for
LANG in the environment (potentially passed to it by Xcode; the OS
does not set such an environment variable). It is confusing if that
then gets set during the execution of core code back to a device's
default.

Change-Id: I9dcf44090aed84b55fd4240bda2562026cd8dacb

sal/osl/unx/nlsupport.cxx

@@ -836,9 +836,11 @@ void imp_getProcessLocale( rtl_Locale ** ppLocale )
     /* return the locale */
     *ppLocale = parse_locale( locale.getStr() );
 
+#ifndef IOS
     setenv( "LC_ALL", locale.getStr(), 1);
     setenv("LC_CTYPE", locale.getStr(), 1 );
     setenv("LANG", locale.getStr(), 1 );
+#endif
 }
 #else
 /*****************************************************************************