[gimp] INSTALL: add --enable-relocatable-bundle in options list.

[Jehan <jehanp src gnome org>]

commit c543103783cf04e92111d7cf28a37bde0426cd37
Author: Jehan <jehan girinstud io>
Date:   Thu Jun 28 19:21:58 2018 +0200

    INSTALL: add --enable-relocatable-bundle in options list.

 INSTALL.in | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/INSTALL.in b/INSTALL.in
index 1fc1df3383..589b1a37fe 100644
--- a/INSTALL.in
+++ b/INSTALL.in
@@ -202,9 +202,9 @@ compilation and installation output is not shown.
 
   % tar xvfz gimp-@GIMP_VERSION  tar gz   # unpack the sources
   % cd gimp-@GIMP_VERSION@                # change to the toplevel directory
-  % ./configure                           # run the `configure' script
-  % make                                  # build GIMP
-  % make install                          # install GIMP
+  % ./configure                   # run the `configure' script
+  % make                          # build GIMP
+  % make install                  # install GIMP
 
 
 The `configure' script examines your system, and adapts GIMP to run on
@@ -217,6 +217,10 @@ These are:
   --disable-vector-icons.  This option installs raster icons instead of
      vector icons.
 
+  --enable-relocatable-bundle.  This option forces GIMP to search some
+     resources (e.g. MyPaint brushes or libwmf fonts) relatively to the
+     running prefix, rather than using build-time paths.
+
   --enable-shared and --disable-shared.  This option affects whether
      shared libraries will be built or not. Shared libraries provide
      for much smaller executables. The default is to enable shared