The git-version-gen script is not included in tarball releases,
so we need to avoid attempts to call it when running autoreconf.

Upstream-Status: Inappropriate [configuration]

Signed-off-by: Andre McCurdy <armccurdy@gmail.com>

Index: strace-4.10/configure.ac
===================================================================
--- strace-4.10.orig/configure.ac
+++ strace-4.10/configure.ac
@@ -1,7 +1,7 @@
 dnl Process this file with autoconf to create configure.  Use autoreconf.
 AC_PREREQ(2.57)
 AC_INIT([strace],
-	m4_esyscmd([./git-version-gen .tarball-version]),
+	m4_esyscmd_s([cat .tarball-version]),
 	[strace-devel@lists.sourceforge.net])
 AC_CONFIG_SRCDIR([strace.c])
 AC_CONFIG_AUX_DIR([.])