[gimp] icons: use cp not LN_S to "create" the inverted 12/gimp-default-colors.png

[Michael Natterer <mitch src gnome org>]

commit 3428a5c579102fc0c8e554ce237405e36bf7f946
Author: Michael Natterer <mitch gimp org>
Date:   Mon Jan 11 20:34:16 2016 +0100

    icons: use cp not LN_S to "create" the inverted 12/gimp-default-colors.png
    
    Linking it apparently messed up something (identical timestamps?) so
    sudo make install would fail.

 icons/Symbolic-Inverted/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/icons/Symbolic-Inverted/Makefile.am b/icons/Symbolic-Inverted/Makefile.am
index 4cdb4c9..cbc436a 100644
--- a/icons/Symbolic-Inverted/Makefile.am
+++ b/icons/Symbolic-Inverted/Makefile.am
@@ -25,7 +25,7 @@ include $(top_srcdir)/icons/Symbolic/icon-list.mk
 # As an exception, we do not want to invert gimp-default-colors.
 # Just use it as-is.
 12/gimp-default-colors.png: $(top_srcdir)/icons/Symbolic/12/gimp-default-colors.png
-       $(LN_S) -f $< $@
+       cp -f $< $@
 
 # We are basically repeating the same rule for every subdirectory, which
 # is very dirty. But this is the only way we found to have a rule