Rename install.out to install.log

install.out sounds too much like a counterpart to install.iss.in, which is
not what install.out is.

Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>

.gitignore

@@ -4,7 +4,7 @@
 /installer/ReleaseNotes.html
 /installer/bindimage.txt
 /installer/install.iss
-/installer/install.out
+/installer/install.log
 /installer/is-unicode.exe
 /installer/file-list.iss
 /installer/package-versions.txt

installer/release.sh

@@ -107,7 +107,7 @@ sed -e "s|%APPVERSION%|$version|g" \
 exit
 
 echo "Launching Inno Setup compiler ..." &&
-./InnoSetup/ISCC.exe install.iss > install.out ||
+./InnoSetup/ISCC.exe install.iss > install.log ||
 die "Could not make installer"
 
 echo "Tagging Git for Windows installer release ..."
@@ -117,4 +117,4 @@ else
 	git tag -a -m "Git for Windows $version" Git-$version
 fi
 
-echo "Installer is available as $(tail -n 1 install.out)"
+echo "Installer is available as $(tail -n 1 install.log)"