Ignore third_party and Godeps in git precommit hooks.

misc/git/hooks/gofmt

@@ -9,7 +9,7 @@
 # it has execute permissions.
 #
 # This script does not handle file names that contain spaces.
-gofiles=$(git diff --cached --name-only --diff-filter=ACM | grep '.go$')
+gofiles=$(git diff --cached --name-only --diff-filter=ACM | grep '^go/.*\.go$')
 
 [ -z "$gofiles" ] && exit 0
 unformatted=$(goimports -l=true $gofiles 2>&1 | awk -F: '{print $1}')

misc/git/hooks/golint

@@ -15,7 +15,7 @@ if [ -z "$(which golint)" ]; then
   exit 1
 fi
 
-gofiles=$(git diff --cached --name-only --diff-filter=ACM | grep '.go$')
+gofiles=$(git diff --cached --name-only --diff-filter=ACM | grep '^go/.*\.go$')
 
 errors=
 

misc/git/hooks/govet

@@ -9,7 +9,7 @@
 # it has execute permissions.
 #
 # This script does not handle file names that contain spaces.
-gofiles=$(git diff --cached --name-only --diff-filter=ACM | grep '.go$')
+gofiles=$(git diff --cached --name-only --diff-filter=ACM | grep '^go/.*\.go$')
 
 # If any checks are found to be useless, they can be disabled here.
 # See the output of "go tool vet" for a list of flags.