there's no real need to run AC_CHECK_FILE to see if a file exists.  if the
static link fails later on, then the static lib didn't exist.  this also
breaks cross-compiling.

--- a/configure.ac
+++ b/configure.ac
@@ -448,8 +448,6 @@
               sepol_srcdir="")
 if test "x${sepol_srcdir}" = "x"; then
    sepol_srcdir=${sepol_devel_libdir}
-   AC_CHECK_FILE([${sepol_srcdir}/libsepol.a],,
-      AC_MSG_ERROR([make sure libsepol-static is installed]))
 else
    AC_MSG_CHECKING([for compatible sepol source tree])
    sepol_version=${sepol_srcdir}/VERSION