Default address size to 64

Get with the times and switch the default address size to 64. This will
simplify dev environment setup as most people will be able to drop the
AUTOBUILD_ADDRSIZE environment variable.

Closes #45

Author: bennettgoble

README.md

@@ -21,7 +21,7 @@ For more information, see [Autobuild's wiki page][wiki].
 
 | Name | Default | Description |
 |-|-|-|
-| AUTOBUILD_ADDRSIZE | 32 | Target address size |
+| AUTOBUILD_ADDRSIZE | 64 | Target address size |
 | AUTOBUILD_BUILD_ID | - | Build identifier |
 | AUTOBUILD_CONFIGURATION | - | Target build configuration |
 | AUTOBUILD_CONFIG_FILE | autobuild.xml | Autobuild configuration filename |

autobuild/common.py

@@ -39,7 +39,7 @@ class AutobuildError(RuntimeError):
 PLATFORM_LINUX64   = 'linux64'
 PLATFORM_COMMON    = 'common'
 
-DEFAULT_ADDRSIZE = 32
+DEFAULT_ADDRSIZE = 64
 
 # Similarly, if we have an explicit platform in the environment, keep it. We
 # used to query os.environ in establish_platform(), instead of up here. The