Update .gitignore files

Add kmod-* prefixed tool names, add 'tags' in root directory (for ctags,
matches cscope.out ignore already in there), and prefix tools/ entries
with '/' so they are absolute ignores and don't apply to subdirectories.

.gitignore

@@ -20,3 +20,4 @@ Makefile.in
 *~
 .*.swp
 cscope.out
+tags

testsuite/.gitignore

@@ -1,11 +1,11 @@
-.dirstamp
 *.lo
 *.la
 *.so
-rootfs/
-test-init
-test-loaded
-test-testsuite
-test-modinfo
-test-alias
-test-new-module
+/.dirstamp
+/rootfs/
+/test-alias
+/test-init
+/test-loaded
+/test-modinfo
+/test-new-module
+/test-testsuite

tools/.gitignore

@@ -1,9 +1,15 @@
-.dirstamp
-insmod
-rmmod
-lsmod
-modprobe
-modinfo
-depmod
-kmod
-kmod-nolib
+/.dirstamp
+/depmod
+/insmod
+/kmod
+/kmod-depmod
+/kmod-insmod
+/kmod-lsmod
+/kmod-modinfo
+/kmod-modprobe
+/kmod-nolib
+/kmod-rmmod
+/lsmod
+/modinfo
+/modprobe
+/rmmod