[gimp] Fix build with vector icons enabled

[Tobias Ellinghaus <et src gnome org>]

commit c50449670b3b4292f463b1b80894abb8de2dc91b
Author: Tobias Ellinghaus <me houz org>
Date:   Sun Apr 15 16:10:04 2018 +0200

    Fix build with vector icons enabled
    
    The invert-svg tool was never built so generating the Symbolic-Inverted
    icons failed. Thanks Ell for the hint how to fix this.

 tools/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/tools/Makefile.am b/tools/Makefile.am
index fd62fc2..117560b 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -61,7 +61,7 @@ invert-svg$(BUILD_EXEEXT): invert-svg.c
 #compute_svg_viewbox_LDADD = $(SVG_LIBS)
 
 # Build tools which must be built for the host platform.
-all: invert-svg$(BUILD_EXEEXT)
+all-local: invert-svg$(BUILD_EXEEXT)
 
 DISTCLEANFILES = invert-svg$(BUILD_EXEEXT)
 endif