build: Report gcc and binutils versions in debug log

Attempt to extract the gcc and binutils versions.  Report that
information in the debug log.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
diff --git a/vgasrc/vgaversion.c b/vgasrc/vgaversion.c
index 02c8ea3..1ef5ddb 100644
--- a/vgasrc/vgaversion.c
+++ b/vgasrc/vgaversion.c
@@ -3,3 +3,4 @@
 #include "types.h"
 
 char VERSION[] VAR16 = BUILD_VERSION;
+char BUILDINFO[] VAR16 = BUILD_TOOLS;