xbps-src: require sudo to build packages.

The reason is that fakeroot can't read files that have restrictive
perms and you'd have to change them before the src installation, and
restoring them at binpkg pre-installation.

I prefer to avoid all this and build the pkg with appropiate perms.

--HG--
extra : convert_revision : 8a5086049ab575962913eda0cb2ace0c211b97f1

doc/BINPKG_INFO

@@ -76,7 +76,7 @@ To install binary packages, firstly a repository must be created as well as
 some binary packages for it. The flow for this task is:
 
 	1- xbps-src install <package>
-	2- xbps-src build-pkg all
+	2- xbps-src build-pkg all [requires sudo access]
 	3- xbps-src genindex
 	4- xbps-repo add $XBPS_PACKAGES
 	5- xbps-bin install -r /rootdir <package>

doc/README

@@ -43,6 +43,7 @@ xbps binary/source packages:
 	* wget
 	* libarchive (development package)
 	* perl
+	* sudo
 
 Super-user privileges are required as well, because all packages are built
 in a chroot (except the ones that are included in a virtual package to be

doc/SRCPKG_INFO

@@ -2,7 +2,8 @@
  REQUIREMENTS
 -----------------------------------------------------------------------------
 
-To be able to build packages the following software is required:
+To be able to build packages from source the following software is required
+in the host system:
 
 	* GNU Binutils
 	* GNU Bison
@@ -20,8 +21,6 @@ Super-user privileges are required as well, because all packages are built
 in a chroot (except the ones that are included in a virtual package to be
 able to build a minimal system for the chroot).
 
-PLEASE NOTE THAT fakechroot or fakeroot-ng DO NOT WORK.
-
 ------------------------------------------------------------------------------
  HOW TO BUILD/HANDLE PACKAGES FROM SOURCE
 ------------------------------------------------------------------------------

doc/TODO

@@ -16,8 +16,6 @@ xbps-cmpver:
 
 Packages:
  * fix mpfr hardcoded rpath for gmp.
- * Fix sudo permissions for /etc/sudoers. This must be 644 to be able to
-   build the binary package.
 
 xbps-bin:
  * Add support to handle conf_files and keep_dirs from package metadata.