Add "READ_64" convenient macro.

git-svn-id: https://elftoolchain.svn.sourceforge.net/svnroot/elftoolchain/trunk@2905 95820547-d848-0410-985e-9ae8fe0fa350
Preload the content of .eh_frame section when preparing input objects.
This is useful for .eh_frame optimization later.

git-svn-id: https://elftoolchain.svn.sourceforge.net/svnroot/elftoolchain/trunk@2906 95820547-d848-0410-985e-9ae8fe0fa350
Implement .eh_frame optimization: eliminate duplicate Common
Information Entries collected from input objects when generating
output .eh_frame section, so that the linker will produce smaller
output object.

git-svn-id: https://elftoolchain.svn.sourceforge.net/svnroot/elftoolchain/trunk@2907 95820547-d848-0410-985e-9ae8fe0fa350
Add "READ_16" convenient macro.

git-svn-id: https://elftoolchain.svn.sourceforge.net/svnroot/elftoolchain/trunk@2908 95820547-d848-0410-985e-9ae8fe0fa350
Add support for "--eh-frame-hdr" command line option.

git-svn-id: https://elftoolchain.svn.sourceforge.net/svnroot/elftoolchain/trunk@2909 95820547-d848-0410-985e-9ae8fe0fa350
Implement support for creating ".eh_frame_hdr" output section.

git-svn-id: https://elftoolchain.svn.sourceforge.net/svnroot/elftoolchain/trunk@2910 95820547-d848-0410-985e-9ae8fe0fa350