Replace filepattern with pathspec for consistency

pathspec is the most widely used term, and is the one defined in
gitglossary.txt. <filepattern> was used only in the synopsys for git-add
and git-commit, and in git-add.txt. Get rid of it.

This patch is obtained with by running:

  perl -pi -e 's/filepattern/pathspec/' `git grep -l filepattern`

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/commit.c b/builtin/commit.c
index d6dd3df..9668410 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -31,12 +31,12 @@
 #include "sequencer.h"
 
 static const char * const builtin_commit_usage[] = {
-	N_("git commit [options] [--] <filepattern>..."),
+	N_("git commit [options] [--] <pathspec>..."),
 	NULL
 };
 
 static const char * const builtin_status_usage[] = {
-	N_("git status [options] [--] <filepattern>..."),
+	N_("git status [options] [--] <pathspec>..."),
 	NULL
 };