let's own the packaged stuff by root:root again (fdo#67388)

We have started to use -fvisibility=hidden globally with GCC.
The hacky libgetuid.so does not work if the symbols are hidden.

In addition, the library was renamed from getuid.so to libgetuid.so
during gbuildisation; There was more location where it was not fixed;
The result was that the packages and files in the Linux download tarballs
were owned by some "ugly" user and group.

Change-Id: I22f62b861c373f2553dcccc85a84dddabaf1f418

setup_native/Library_getuid.mk

@@ -14,6 +14,14 @@ $(eval $(call gb_Library_add_defs,getuid,\
     -D_GNU_SOURCE \
 ))
 endif
+
+# the library is used by LD_PRELOAD; make sure that we see the symbols ;-)
+ifeq ($(COM),GCC)
+$(eval $(call gb_Library_add_cflags,getuid,\
+    -fvisibility=default \
+))
+endif
+
 $(eval $(call gb_Library_add_cobjects,getuid,\
     setup_native/scripts/source/getuid \
 ))

solenv/bin/modules/installer/download.pm

@@ -194,7 +194,7 @@ sub get_path_for_library
 {
     my ($includepatharrayref) = @_;
 
-    my $getuidlibraryname = "getuid.so";
+    my $getuidlibraryname = "libgetuid.so";
 
     my $getuidlibraryref = "";