tools/pci: add wrapper for libpciaccess

This allows unit testing code that uses libpciaccess.

Signed-off-by: Benjamin Fair <benjaminfair@google.com>
Change-Id: Iec559c72e0e7b6c2e8737a54bb3e88fe1e0f4fdb
diff --git a/tools/Makefile.am b/tools/Makefile.am
index e0a192e..f63a112 100644
--- a/tools/Makefile.am
+++ b/tools/Makefile.am
@@ -22,6 +22,7 @@
 	io.cpp \
 	net.cpp \
 	pci.cpp \
+	pciaccess.cpp \
 	p2a.cpp \
 	progress.cpp
 libupdater_la_LIBADD = $(top_builddir)/libfirmware_common.la