configure.ac: Bump down version number

To ensure that the release candidate version has the correct
lexicographic relation to the release.

Start of GHC 8.1 development branch

(This annotated tag helps tools such as `git describe`)

Release 7.103a

This is a patchlevel release over 7.10.3 which fixes a few
documentation issues.

Release version 7.10.3

x86 codegen: don't generate location comments

The following source snippet 'module A where x */* y = 42'
when being compiled with '-g' option emits syntactically
invalid comment for GNU as:

    .text
        .align 8
        .loc 1 3 1 /* */* */

Fixed by not emitting comments at all. We already suppress
all asm comments in 'X86/Ppr.hs'.

Signed-off-by: Sergei Trofimovich <[email protected]>

Test Plan: added test and check it works

Reviewers: scpmw, simonmar, austin, bgamari

Reviewed By: simonmar

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D1386

GHC Trac Issues: #10667

aclocal.m4: Do not check for readelf on darwin

Tested on darwin and linux. Not tested on mingw32.

Only apply WERROR to Stage2HcOpts and LibHcOpts

This prevents warnings from the bootstrap compiler from killing validation

Version 7.10.2 (Release)

Correct BangPat SrcSpan calculation

Summary:
Previously when the split was performed in splitBang, `BangPat` was given the
same SrcSpan as the whole of the LHS of the declaration. This patch
correctly calculates the value.

Reviewers: alanz, austin

Reviewed By: alanz, austin

Subscribers: thomie, bgamari

Differential Revision: https://phabricator.haskell.org/D1020

GHC Trac Issues: #10588

(cherry picked from commit c6bb2fc)

docs: More 7.10.2 release notes

Signed-off-by: Austin Seipp <[email protected]>