Convert sal/osl/unx/tempfile.c to C++

...for easier future maintenance

Change-Id: I501076882daa7f36f414f9fa62f790eb85ac3259

sal/Library_sal.mk

@@ -165,6 +165,7 @@ $(eval $(call gb_Library_add_exception_objects,sal,\
 	sal/osl/unx/process_impl \
 	sal/osl/unx/profile \
 	sal/osl/unx/security \
+	sal/osl/unx/tempfile \
         $(if $(filter DESKTOP,$(BUILD_TYPE)), sal/osl/unx/salinit) \
 ))
 $(eval $(call gb_Library_add_cobjects,sal,\
@@ -175,7 +176,6 @@ $(eval $(call gb_Library_add_cobjects,sal,\
 	sal/osl/unx/readwrite_helper \
 	sal/osl/unx/socket \
 	sal/osl/unx/system \
-	sal/osl/unx/tempfile \
 	sal/osl/unx/thread \
 	sal/osl/unx/time \
 ))

sal/osl/unx/tempfile.c → sal/osl/unx/tempfile.cxx

@@ -217,7 +217,7 @@ static oslFileError osl_create_temp_file_impl_(
         offset_file_name++;
     }
 
-    while(1) /* try until success */
+    while(true) /* try until success */
     {
         osl_gen_random_name_impl_(&rand_name);