autotools: Fix for autoconf-archive 2019.01.19

The code coverage macros from the archive changed in a backward
incompatible way. This adds a workaround to autodetect either version
and do the right thing.

Change-Id: I63d1cdf6edb125d75872d6dae38f8602fc043431
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/.gitignore b/.gitignore
index a2b962a..a11e810 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,6 +20,7 @@
 ar-lib
 arm-openbmc-linux-gnueabi-libtool
 autom4te.cache/
+/aminclude_static.am
 compile
 config.guess
 config.h