[gimp] Fixes two minor issues when builddir != srcdir

[Massimo Valentini <mvalentini src gnome org>]

commit ddf09b3a36adc1e93b27c604cc713d09fdaf741d
Author: Massimo Valentini <mvalentini src gnome org>
Date:   Thu May 26 19:49:17 2011 +0200

    Fixes two minor issues when builddir != srcdir

 Makefile.am     |    2 +-
 app/Makefile.am |    4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 5fd12dc..8f33fc9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -43,7 +43,7 @@ pkgconfig_DATA = \
 
 AUTHORS: authors.xml authors.xsl
 if HAVE_XSLTPROC
-	$(XSLTPROC) -o $(@) authors.xsl $< || rm -f $(@)
+	$(XSLTPROC) -o $(@) $(top_srcdir)/authors.xsl $< || rm -f $(@)
 endif
 
 
diff --git a/app/Makefile.am b/app/Makefile.am
index 8b5a4a1..6a6648d 100644
--- a/app/Makefile.am
+++ b/app/Makefile.am
@@ -271,8 +271,8 @@ dist-hook: dist-check-gimp-console dist-dump-gimprc
 # in which case the git-version.h we ship is correct.
 git-version.h: update-git-version-header
 	@if test -d "$(top_srcdir)/.git"; then \
-	  git_version="`git describe`"; \
-	  git_last_commit_timestamp="`git log -n1 --reverse --pretty=%ct`"; \
+	  git_version="`git --git-dir=$(top_srcdir)/.git describe`"; \
+	  git_last_commit_timestamp="`git --git-dir=$(top_srcdir)/.git log -n1 --reverse --pretty=%ct`"; \
 	  git_last_commit_year="`date --utc -d \"1970-01-01 + $$git_last_commit_timestamp seconds\" '+%Y'`"; \
 	elif test ! -f "$@"; then \
 	  git_version="Unknown, shouldn't happen"; \