grep: Re-add gettext to build_requires, bump revision

In the likely event that we split the gettext package, the build would
otherwise break.

sys-apps/grep/grep-2.14.recipe

@@ -8,7 +8,7 @@ CHECKSUM_MD5="db55b9fc67d8c0895f3c73e94e2aebe3"
 # XZ file format:
 #SRC_URI="http://ftp.gnu.org/pub/gnu/grep/grep-2.14.tar.xz"
 #CHECKSUM_MD5="d4a3f03849d1e17ce56ab76aa5a24cab"
-REVISION="2"
+REVISION="3"
 ARCHITECTURES="x86_gcc2 ?x86"
 
 PATCHES="grep-2.14-gcc2.patch"
@@ -26,6 +26,7 @@ REQUIRES="
 	"
 BUILD_REQUIRES="
 	$REQUIRES
+	gettext
 	cmd:aclocal
 	cmd:autoconf
 	cmd:automake