mutt: don't use host mailpath definition

Use configure --with-mailpath=/var/mail instead of letting it guess the
value base on the host path.  If configure can't find it, the package
will fail to build.  The path was taken from the current bot build.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>

mail/mutt/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mutt
 PKG_VERSION:=1.14.7
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE_URL:=https://bitbucket.org/mutt/mutt/downloads/ \
 		http://ftp.mutt.org/pub/mutt/
@@ -45,6 +45,7 @@ CONFIGURE_ARGS += \
 	--oldincludedir=$(PKG_BUILD_DIR)/. \
 	--enable-pop \
 	--enable-imap \
+	--with-mailpath=/var/mail \
 	--with-ssl \
 	--without-idn \
 	--disable-doc