[gnome-battery-bench] Fix out-of-source builds

[Christian Kellner <gicmo src gnome org>]

commit 2515ed274ae6097bc6efae0f969fc5982c128e22
Author: Christian Kellner <gicmo gnome org>
Date:   Mon Dec 12 17:16:08 2016 +0100

    Fix out-of-source builds
    
    The autogen.sh called autoconf and friends in the current working
    directory and therfore couldn't find the neccessary files.
    Additionally for the proper generation of gnome-battery-bench.c
    we need to include the actual source dir as an source directory.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=775995

 autogen.sh      |    5 +++++
 src/Makefile.am |    5 ++++-
 2 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index dbefa38..71b42f7 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -8,6 +8,9 @@ test -z "$srcdir" && srcdir=.
         exit 1
 }
 
+olddir=`pwd`
+cd "$srcdir"
+
 PKG_NAME=`autoconf --trace 'AC_INIT:$1' "$srcdir/configure.ac"`
 
 if [ "$#" = 0 -a "x$NOCONFIGURE" = "x" ]; then
@@ -22,6 +25,8 @@ aclocal --install || exit 1
 autoreconf --verbose --force --install -Wno-portability || exit 1
 set +x
 
+cd "$olddir"
+
 if [ "$NOCONFIGURE" = "" ]; then
         set -x
         $srcdir/configure "$@" || exit 1
diff --git a/src/Makefile.am b/src/Makefile.am
index 446f87d..a79662e 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -71,4 +71,7 @@ EXTRA_DIST += $(ui_files)
 gnome-battery-bench.gresource.c: $(ui_files)
 
 %.gresource.c : %.gresource.xml
-       $(GLIB_COMPILE_RESOURCES) --generate --target $@ $<
+       $(AM_V_GEN) $(GLIB_COMPILE_RESOURCES) \
+        --sourcedir="$(srcdir)"               \
+        --generate                            \
+        --target $@ $<