[libgtop] Use a more portable construct for doing substitutions.

[Jasper Lievisse Adriaanse <jasperla src gnome org>]

commit cecf53394ba213c03b7165749eb011d3809de48d
Author: Jasper Lievisse Adriaanse <jasper humppa nl>
Date:   Wed Jun 22 17:22:26 2011 +0200

    Use a more portable construct for doing substitutions.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=652981

 m4/introspection.m4 |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/m4/introspection.m4 b/m4/introspection.m4
index 91b9051..6dcbc33 100644
--- a/m4/introspection.m4
+++ b/m4/introspection.m4
@@ -58,9 +58,9 @@ m4_define([_GOBJECT_INTROSPECTION_CHECK_INTERNAL],
        INTROSPECTION_COMPILER=`$PKG_CONFIG --variable=g_ir_compiler gobject-introspection-1.0`
        INTROSPECTION_GENERATE=`$PKG_CONFIG --variable=g_ir_generate gobject-introspection-1.0`
        INTROSPECTION_GIRDIR=`$PKG_CONFIG --variable=girdir gobject-introspection-1.0`
-       INTROSPECTION_GIRDIR=${INTROSPECTION_GIRDIR/$datadir/\$(datadir)}
+       INTROSPECTION_GIRDIR=`echo ${INTROSPECTION_GIRDIR} | sed -e "s|${datadir}|\\\$(datadir)|"`
        INTROSPECTION_TYPELIBDIR="$($PKG_CONFIG --variable=typelibdir gobject-introspection-1.0)"
-       INTROSPECTION_TYPELIBDIR=${INTROSPECTION_TYPELIBDIR/$libdir/\$(libdir)}
+       INTROSPECTION_TYPELIBDIR=`echo ${INTROSPECTION_TYPELIBDIR} | sed -e "s|${libdir}|\\\$(libdir)|"`
        INTROSPECTION_CFLAGS=`$PKG_CONFIG --cflags gobject-introspection-1.0`
        INTROSPECTION_LIBS=`$PKG_CONFIG --libs gobject-introspection-1.0`
        INTROSPECTION_MAKEFILE=`$PKG_CONFIG --variable=datadir gobject-introspection-1.0`/gobject-introspection-1.0/Makefile.introspection