Modelled after tcl-remove-hardcoded-install-path.patch

diff -ur tk8.6.1/unix/configure tk8.6.1-new/unix/configure
--- tk8.6.1/unix/configure	2013-09-17 19:25:13.000000000 +0700
+++ tk8.6.1-new/unix/configure	2014-05-02 01:36:05.490954752 +0700
@@ -11213,7 +11213,7 @@
     TCL_STUB_FLAGS="-DUSE_TCL_STUBS"
 fi
 
-TK_LIBRARY='$(prefix)/lib/tk$(VERSION)'
+TK_LIBRARY='$(libdir)/tk$(VERSION)'
 PRIVATE_INCLUDE_DIR='$(includedir)'
 HTML_DIR='$(DISTDIR)/html'
 TK_PKG_DIR='tk$(VERSION)'
diff -ur tk8.6.1/unix/configure.in tk8.6.1-new/unix/configure.in
--- tk8.6.1/unix/configure.in	2013-09-17 19:25:13.000000000 +0700
+++ tk8.6.1-new/unix/configure.in	2014-05-02 01:36:04.567621486 +0700
@@ -666,7 +666,7 @@
     TCL_STUB_FLAGS="-DUSE_TCL_STUBS"
 fi
 
-TK_LIBRARY='$(prefix)/lib/tk$(VERSION)'
+TK_LIBRARY='$(libdir)/tk$(VERSION)'
 PRIVATE_INCLUDE_DIR='$(includedir)'
 HTML_DIR='$(DISTDIR)/html'
 TK_PKG_DIR='tk$(VERSION)'