[SV 45515] Ignore Windows-specific build artifacts

* .gitignore: Ignore *.exe, *.dll.a, *.lib, *pdb, and a few more MSVC
specific artifacts.
Suggested by James Johnston <johnstonj.public@codenest.com>

.gitignore

@@ -27,6 +27,12 @@ gmk-default.h
 loadavg
 make
 *.o
+*.exe
+*.dll.a
+*.obj
+*.lib
+*.pdb
+*.sbr
 
 # Distribution artifacts
 .dep_segment