Clean up /usr/sbin and /usr/etc

Affected recipes: cyrus-sasl, filesystem, gdb, heimdal, tar, tzcode, util-linux

Also:
- add missing dependencies to gdb
- re-format filesystem PKGBUILD slightly

tzcode/PKGBUILD

@@ -4,7 +4,7 @@ pkgname=tzcode
 _ver=2015a
 # use a pacman compatible version scheme
 pkgver=${_ver/[a-z]/.${_ver//[0-9.]/}}
-pkgrel=1
+pkgrel=2
 pkgdesc="Sources for time zone and daylight saving time data"
 arch=('i686' 'x86_64')
 url="http://www.iana.org/time-zones"
@@ -24,7 +24,7 @@ source=(
         tzcode-man8.patch)
 sha1sums=('b08b129f32ad9f5d260c8f519dbcafeb33118e34'
           '22541acf7ffed47b7ee67959c112b6f23b1afefb'
-          'c6a8a818e2d6926f6b00fb6d6549fcf05af0e150'
+          'fdbd29f4b204c74f477cbba9777daa0e2dbed2e8'
           'ea2354956f2ae3c09527647486f7f501049d01da'
           '46feb526f958e4cc027e253345fbe31b41dc5bf4'
           '2095c6a471634cc9574b24a9b661d1f32952a11a'

tzcode/tzcode-makefile.patch

@@ -30,7 +30,7 @@
  # The "tzselect", "zic", and "zdump" commands get installed in. . .
  
 -ETCDIR=		$(TOPDIR)/etc
-+ETCDIR=		$(TOPDIR)/sbin
++ETCDIR=		$(TOPDIR)/bin
  
  # If you "make INSTALL", the "date" command gets installed in. . .